Temperature 37 during the day and at night. Causes of periodic or constant slight increase in body temperature

What are the reasons for a constant or periodic slight increase in temperature at certain times of the day, in the evening or during the day? Why is an increase in body temperature from 37.2 to 37.6° often observed in children, the elderly or pregnant women?

What does low-grade fever mean?

Low-grade fever is indicated slight increase in body temperature before 37.2-37.6°C, the value of which, as a rule, fluctuates in the range of 36.8 ± 0.4 °C. Sometimes temperatures can reach 38°C, but do not exceed this value, since a temperature over 38°C indicates fever.

Low-grade fever can affect anyone, but children and elderly people most vulnerable because they are more susceptible to infections and their immune system is unable to protect the body.

When and how does low-grade fever appear?

Low-grade fever may appear in different moments of the day, which sometimes correlates with possible pathological or non-pathological causes.

Depending on the time at which low-grade fever occurs, we can distinguish:

• Morning: The subject suffers from low-grade fever in the morning when the temperature rises above 37.2°C. Although in the morning physiologically normal body temperature should be below the daily average, therefore even a slight increase can be defined as low-grade fever.
• After meals: After lunch, due to digestive processes and related physiological processes, body temperature rises. This is not uncommon, so a low-grade fever is considered to be an increase in temperature of more than 37.5°C.
• Day/evening: During the day and evening there are also periods of physiological increase in body temperature. Therefore, subfebrile temperature includes an increase above 37.5°C.

Low-grade fever may also occur various modes, which, as in the previous case, depends on the nature of the reasons, for example:

• Sporadic: This type of low-grade fever is episodic, may be associated with seasonal changes or the onset of the menstrual cycle in women of childbearing age, or may be a consequence of intense physical activity. This form causes the least concern, since, in most cases, it is not associated with pathology.
• Intermittent: This low-grade fever is characterized by fluctuations or periodic occurrence at certain points in time. May be associated, for example, with physiological events, periods of intense stress, or an indicator of disease progression.
• Persistent: A constant low-grade fever that persists and does not subside throughout the day and lasts for quite a long time is alarming, as it is closely associated with certain diseases.

Symptoms associated with low-grade fever

Low-grade fever can be completely asymptomatic or accompanied by a wide variety of symptoms, which, as a rule, become the reason for visiting a doctor for diagnosis.

Symptoms most often associated with low-grade fever include:

• Asthenia: The subject experiences a feeling of fatigue and exhaustion that directly correlates with the rise in temperature. This may be due to infections, malignancies and seasonal changes.
• Pain: Along with the onset of a low-grade fever, the subject may experience joint pain, back pain, or leg pain. In this case, there may be a connection with the flu or a sharp seasonal change.
• Cold symptoms: if a headache, dry cough and sore throat appear along with a low-grade fever, then hypothermia and exposure to the virus may be occurring.
• Abdominal symptoms: along with a slight increase in temperature, the patient may complain of abdominal pain, diarrhea, and nausea. One of the possible reasons is infection with a gastroenterological infection.
• Psychogenic symptoms: Sometimes it is possible, along with the appearance of low-grade fever, the appearance of episodes of anxiety, tachycardia and sudden trembling. In this case, it is possible that the subject is suffering from depressive problems.
• Enlarged lymph nodes: If a low-grade fever is accompanied by swollen lymph nodes and profuse sweating, especially at night, it may be associated with a tumor or infection, for example, mononucleosis.

Causes of low-grade fever

When low-grade fever is sporadic or periodic, has a correlation with certain periods of years, months or days, then it is almost certainly associated with a non-pathological cause.

Temperature causes...

Prolonged and persistent low-grade fever, which persists for many days and appears mainly in the evening or during the day, is often associated with a specific disease.

Causes of subfebrile temperature, without pathology:

• Digestion: After eating food, digestive processes cause a physiological increase in body temperature. This may cause a mild low-grade fever, especially if you have ingested hot food or drinks.
• Heat: In summer, when the air reaches high temperatures, being in a room that is too hot can cause increase in body temperature. This happens especially often in children and newborns, whose body thermoregulation system is not yet fully developed.
• Stress: In some individuals, especially those who are sensitive to stressful events, a low-grade fever may be interpreted as a reaction to stress. Typically, a rise in temperature occurs in anticipation of stressful events or immediately after they occur. This type of low-grade fever can occur even in infants, for example when crying very intensely for a long time.
• Hormonal changes: In women, low-grade fever may be closely related to hormonal changes. Thus, in the premenstrual stage, body temperature increases by 0.5-0.6°C, and this can determine a slight increase in temperature in the range from 37 to 37.4°C. Also, in the early stages of pregnancy, hormonal changes lead to a similar increase in body temperature.
• Season change: as part of the change of season and a sharp transition from high temperatures to cold, and vice versa, a change in body temperature may occur (without a pathological basis).
• Medicines: Some medications have low-grade fever as a side effect. These include antibacterial drugs of the beta-lactam class of antibiotics, most anticancer drugs and other drugs such as quinidine, phenytoin and some vaccine components.

Pathological causes of subfebrile temperature

The most common pathological causes of low-grade fever are:

• Neoplasms: Tumors are the main cause of persistent low-grade fever, especially in older people. Among the tumors that most often lead to an increase in body temperature are leukemia, Hodgkin lymphoma and several other types of cancer. Typically, low-grade fever in the case of a tumor is accompanied by rapid weight loss, a strong feeling of fatigue, and in the case of tumors involving blood cells, anemia.
• Viral infections: One of the viral infections that causes low-grade fever is HIV, which leads to the development of acquired immunodeficiency syndrome. This virus tends to destroy the subject's immune system, therefore causing exhaustion, which is manifested by many symptoms, one of which is low-grade fever, opportunistic infections, asthenia and weight loss. Another viral infection that causes persistent low-grade fever is infectious mononucleosis, known as “kissing disease” due to its transmission by salivary secretions.
• Respiratory tract infections: Low-grade fever is often present in cases of infection involving the respiratory tract (such as pharyngitis, sinusitis, pneumonia, bronchitis or a cold). One of the most dangerous respiratory tract infections that causes low-grade fever is tuberculosis, which is accompanied by profuse sweating, asthenia, weakness and weight loss.
• Thyroid problems: Low-grade fever is one of the symptoms of hyperthyroidism, caused by thyrotoxic destruction of the thyroid gland. This destruction of the thyroid gland is called thyroiditis and is often caused by a viral infection.
• Other pathologies: There are other diseases, such as celiac disease or rheumatic fever caused by streptococcal infection, beta-hemolytic type, which include the appearance of low-grade fever. However, in these cases, low-grade fever is not the main symptom.

How is subfebrile temperature treated?

Low-grade fever is not a pathology, but a symptom with which the body can indicate that something is going wrong. In fact, there are many diseases that can lead to persistent low-grade fever.

However, often slight increase in body temperature has no pathological causes and can be compensated using simple natural remedies.

Finding the cause of low-grade fever is difficult, but, in any case, you should consult a doctor.

Natural remedies against non-pathological low-grade fever

To combat the symptoms caused by low-grade fever, you can use natural remedies, such as herbal medicine. Of course, you should consult your doctor before resorting to one of these remedies.

Among medicinal plants, used in the case of low-grade fever, the most important are:

• Gentian: Used in cases of intermittent low-grade fever, this plant contains bitter glycosides and alkaloids, which gives it antipyretic properties.

Used as a decoction: 2 g of gentian roots are boiled in 100 ml of boiling water, left to infuse for about a quarter of an hour, and then filtered. It is recommended to drink two cups per day.

• White willow: Contains, among other active substances, salicylic acid derivatives, which have the same antipyretic effect as aspirin.

A decoction can be prepared by bringing a liter of water containing about 25 grams of white willow root to a boil. Boil for about 10-15 minutes, then filter and drink two to three times a day.

• Linden: Useful as an associated antipyretic, linden contains tannins and mucilages.

Used in the form of infusions, which are prepared by adding a tablespoon of linden flowers to 250 ml of boiling water, followed by infusion for ten minutes and filtering, you can drink several times a day.

However, the absence of any symptoms is scary because it is impossible to immediately determine the cause of this condition.

The optimal temperature indicator for normally occurring processes in the human body is 36.6°C. However, there are times when the temperature becomes elevated for no reason.

On the one hand, for some people this is the norm: there are people for whom it is always 36, and there are those for whom it is normal - 37.4°C. On the other hand, if a person usually has a normal temperature of 36.6°C, then a high temperature without symptoms in an adult means some kind of disorder.

Why does the temperature rise?

In all other situations, an increase in body temperature above normal indicates that the body is trying to fight something. In most cases, these are foreign agents in the body - bacteria, viruses, protozoa, or a consequence of physical impact on the body (burn, frostbite, foreign body). At elevated temperatures, the existence of agents in the body becomes difficult; infections, for example, die at a temperature of about 38 C.

All fevers are divided into three groups:

1. Low-grade fever, in which the temperature rises from 37 to 38 degrees;
2. Febrile fever - temperature rises from 38 to 39 degrees;
3. Hectic fever is an increase in temperature from 40 degrees and above.

But any organism, like a mechanism, is not perfect and can malfunction. In the case of fever, we can observe this when the body, due to the individual characteristics of the immune system, reacts too violently to various infections, and the temperature rises too high, for most people it is 38.5 C.

Causes of high fever in adults without symptoms

An increase in temperature or fever is observed in almost all acute infectious diseases, as well as during exacerbation of certain chronic diseases. And in the absence of catarrhal symptoms, doctors can determine the cause of the patient’s high body temperature by isolating the pathogen either directly from the local source of infection or from the blood.

It is much more difficult to determine the cause of a temperature without signs of a cold if the disease arose as a result of exposure to opportunistic microbes (bacteria, fungi, mycoplasma) on the body - against the background of a decrease in general or local immunity. Then it is necessary to conduct a detailed laboratory study of not only blood, but also urine, bile, sputum and mucus.

Causes of fever without symptoms may be associated with the following diseases:

In all situations, an increase in temperature without signs of a cold indicates that the body is trying to fight something. For example, the so-called low-grade fever often accompanies anemia - a low level of hemoglobin in the blood.

Is it necessary to lower the temperature?

If its growth is observed, then it is worth bringing down the temperature using antipyretic drugs - Paracetamol, Aspirin ... you can also use NSAIDs - Ibuprofen, Nurofen. For children, children's Nurofen in the form of a sweet syrup is best suited, but Aspirin should not be given to a child.

At 42°C, irreversible changes occur in the cerebral cortex and a lethal outcome is possible. But this rarely happens.

Temperature 37 without symptoms: possible causes

Runny nose, fever, sore throat are all common symptoms of the common cold. But what to do if the temperature is 37 without symptoms? For what reasons does this occur and how to deal with it, let's figure it out.

Causes of fever without visible symptoms:

1. Onset of pregnancy (in women);
2. Weakening of the immune system;
3. The presence of any sluggish infection in the body;
4. Pre-cold condition;
5. Depletion of human energy reserves;
6. General fatigue, depression or post-stress state;
7. Sexually transmitted diseases (syphilis, AIDS, etc.)

Basically, a temperature of 37 without symptoms in an adult is due to the fact that there is some reason that caused such a condition, but it has not completely overcome the person’s defenses.

Temperature 38 without symptoms: possible causes

A temperature of 38 without symptoms can occur quite often. And the reasons for this temperature are not always the same. This temperature may signal that lacunar or follicular tonsillitis is beginning (with catarrhal tonsillitis, the temperature rises slightly).

If a temperature above 38 degrees without symptoms lasts for 3 or more days, then this may be a manifestation of:

The most unpleasant syndrome is the persistence of an elevated temperature for several weeks and even months. This is most likely:

1. A sign of tumor development in the body;
2. Serious endocrine disorders;
3. Leukemia;
4. Diffuse changes in the liver or lungs.

The only thing that all these cases have in common is that in any case, the increase in temperature is due to the body’s resistance, which means that the immune system is fighting.

Temperature 39 without symptoms: possible causes

If a temperature of 39 without symptoms occurs in an adult not for the first time, then this is a clear sign of a pathological decrease in immunity and the development of a chronic inflammatory process. The phenomenon may be accompanied by loss of consciousness, febrile convulsions, difficulty breathing, or a further increase in consciousness. In this case, you must definitely contact a medical institution.

A high body temperature of 39-39.5° without obvious symptoms may be a signal of the following diseases:

1. ARVI;
2. The presence of a tumor process;
3. Development of catarrhal tonsillitis;
4. Manifestation of an allergic reaction;
5. Chronic pyelonephritis;
6. Manifestation of hypothalamic syndrome;
7. The presence of viral endocarditis;
8. The appearance of meningococcal infection.

Determining the causes of a rise in temperature to 39° C in adults is a difficult task even for experienced specialists, since to establish the cause it is necessary to isolate the pathogen from the blood or source of infection.

What to do?

First of all, see your GP. Very often we are simply unable to notice certain symptoms, but a doctor can easily identify them and be able to diagnose the disease. It is also necessary to take tests; they will help identify many diseases that do not manifest themselves externally. Sometimes your doctor may order a sputum, urine or blood culture, x-ray or ultrasound.

If the temperature is very high, it is worth calling an ambulance so that doctors can provide emergency care and resolve the issue of hospitalization. In any case, high temperature is the body’s “cry” for help, and you should pay attention to it.

Causes of low human body temperature

28 comments

Remember, only a doctor can make a diagnosis. Otherwise, you will get all the diseases in the medical encyclopedia. If my temperature rises and my body begins to ache, then I try to lie down at home for a couple of days with tea, lemons and honey. Additionally, I take an Influcid tablet three times a day. Usually on the second day there are positive changes, and after four days I am back on track.

I rarely get sick, but my husband is always sick, he works at school, he has a favorable environment there. But he never stays home on sick leave; in very rare cases he simply postpones classes. Otherwise, you yourself know what the salary is. I buy him Antigrippin from Naturprodukt, which comes in tablet and powder form. I like the pills better; if they are available at the pharmacy, I take them. My husband likes it with grapefruit. But for some reason it is quickly dismantled. I tried to buy Theraflu, but it contains phenylephrine, I’m somehow afraid. I read it. that it affects the heart, but with ARVI, on the contrary, the heart needs rest, otherwise it’s not far from a heart attack. By the way, Antigrippin contains a sedative component.

How much do they pay for one post these days? Not on the market for a long time)

Three weeks ago, my daughter had a fever at night and half a day (38). She's 2.7. There were no symptoms. The next morning I called the doctor. I say: “Why is that?” To which he answered me: “In my example, this happened to several children before the New Year. The tempo was rising high. and stayed for several days without any symptoms. But then it fell as sharply as it had risen. It’s not clear what this is connected with.” I, too, was no less wary than you. But as it turned out, she did not rise again.

A high temperature is an ominous symptom. At least for me it’s either the flu, or something more serious. If I also have chills, then I know for sure that it’s the flu and I start drinking Reaferon Lipint capsules. I rinse my nose with Dolphin, gargle with Rotokan, drink milk warm and chicken broth.

Veronica, there is also phenylephrine in Rinza. Now I’m also more attentive to the ingredients, after all, my health and that of my loved ones. And you can cram in anything. Previously, I didn’t bother much about what was in the pharmacy, so I bought it. Now I only take antigrippin (natural product). I no longer have a grapefruit, but my husband also fell in love with raspberries) In any case, I know for sure that nothing will happen to my heart after it, and it knocks down the symptoms no worse.

In a couple of hours my temperature jumped from 36.6 to 39.9 and so it lasted for a day, then gradually lowered back to normal over the next two days. No symptoms at all. Nothing hurts, just extreme fatigue from the temperature. Doctors do not give an answer, they get off with general phrases. What was it?

Last night I suddenly increased to 38.6 (without any symptoms). I took a pill, slept a little to 38.3 and I went to bed. I drank analgin and by the evening I slept to 36.6! Now I’m 36 exactly, I feel a loss of strength, drowsiness. The same question - What was it?

I came home feeling good, while I was transferred to my home, everything suddenly broke down, chills began, in 20 minutes the temperature rose to 38.7, and there were no other symptoms.

We are hooking up for the second time in a year and a half, we don’t go to kindergarten, but on the street we play with children

I'll torture them out

But now I have found a remedy for this infection

Dichlorvos odorless

I process it and put a bag on my head, they bastards start running around like that, it’s a nightmare

It helps, I held it for 40 minutes, my daughter is 6 years old.

Have you tried Dust?

You're doing everything right, you need something toxic and odorless. So that toxicity cannot be assessed...

The same thing in a couple of hours, the temperature rose to 39 degrees and stayed all day and all night .. they called an ambulance, they did not come ..

The temperature is 38/40 for the seventh day without symptoms, the father does not want to go to the hospital, he drinks medicine to bring down in an hour again 38 and above at home, what can you tell me to do

My mother is sick. She is 83 years old. I recently took her to the village for three days. Apparently she caught a cold there. On the third day she felt sick and weakened. I immediately brought her to the city and put her in the hospital. She has a fever in the evenings. She even sometimes shows symptoms of fever. In the evenings the temperature is 38.5

doctors can’t do anything. They can’t find the cause of the temperature. We did a full analysis of the whole body, MRI of the abdominal cavity, checked for all infections, for ticks, for everything. It’s already the twentieth day and there’s nothing we can do. The medicine isn’t helping. Every day the temperature The doctors can't say anything. She also has complaints about her lower back. Very severe pain in her lower back. I don’t know where to turn next. She is getting weaker every day. She can’t get up anymore, she says that her lower back hurts a lot. If anyone has encountered such a case, please help me, tell me where to turn. It’s just that if this continues, I’m afraid that I’ll lose my mother.

It seems that temperature and pain in the lower back are SICK KIDNEYS

This could be due to kidney disease or something with the spine. Do an ultrasound of the kidneys, urine and blood tests. If everything is fine with the kidneys, then do an MRI of the lumbar spine, sarcoma may develop.

My husband has the same symptoms, we’ve been sick for a month now, the doctors can’t find anything, how are you doing, did you find the cause of the temperature?

We have the same story, only my mother has had the same temperature for 2 months already, they have already given 4 different antibiotics, speaking of kidneys, but the pace. It’s holding on again, we don’t know what to do.

looks like kidneys

My husband’s temperature rises to 39 in the morning for a week. He takes antibiotics and an antipyretic. Nothing helps. ESR blood tests - 12. what to do

My husband has had a fever for 3 months, all the tests were done by ultrasound, also FGS, everyone was in the hospital and they didn’t find anything, it hurts on the right side, but the examination doesn’t show anything, they say MIF 400 tablets, what should I do? And how long can you drink them?

I have had a temperature from 37 to 37/6 for 2 months now, I had a general blood and urine test, the tests were normal, my throat was a little red and the doctor prescribed medication, I took it for a week as it should have been, but the temperature is the same? I also saw a gynecologist and everything was fine too

Check your thyroid, this could be the issue

I’ve been going with 37.2 for two years, but they couldn’t find out. I did an ultrasound of the abdominal cavity, which turned out to be inflammation of the walls of the gallbladder.

My goddaughter has had a fever for 4 days now. It rises to 39. We got a flu shot. Could this be a reaction? Has anyone had this happen? If yes, what did you do?

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only a qualified doctor can treat diseases.

The child's temperature rises to 38 degrees at night

The symptom of elevated temperature often alarms parents and not without reason. Everyone understands perfectly well that hyperthermia always accompanies inflammatory processes in the body, as well as some infectious diseases. But sometimes, elevated temperature can be a symptom of teething, which is so anxiously awaited in the family of a newborn baby. Parents are faced with a lot of questions about how to behave in such a situation, whether to call a doctor or how to alleviate the child’s condition.

And the most pressing question becomes: why does the child’s temperature rise in the evening and what to do if the baby’s temperature rises to 38 degrees by night. Is it worth knocking it down and how to behave so as not to harm the baby? A temperature of 38°C is the limit, after which you need to carefully monitor the child’s behavior and, if necessary, respond promptly and correctly.

Increased temperature in a child

It is known that elevated body temperature is a protective reaction of the body to the introduction of foreign agents. Nothing happens in the body for nothing, and every mechanism is designed for something. Many parents and even some doctors try to lower the temperature and keep it within normal limits. It has already been proven that fever speeds up the healing process. Therefore, it is not worth fighting with a slight rise in temperature, since we can only aggravate the child’s condition and the course of his illness.

When should you lower your temperature?

If the temperature rises in the evening, and on the thermometer scale you will see the number 38.5 ° C, while the baby complains of a headache, there is a decrease in the baby's activity.

When the temperature rises at night in children under 2 months of age, it is worth giving him an antipyretic drug even if the thermometer shows 38.2 ° C.

If the child is prone to convulsions and diseases of the central nervous system or has heart disease, then the temperature should be reduced at an indicator of 37.5 ° C.

With all this, you should not strive to reduce the temperature to normal limits. It is enough for it to drop 1-2 degrees. It would be enough.

Why the temperature rises at night - the main reasons

Quite often it is observed that a child may have a fever in the evening, while there are no other symptoms that would indicate the development of the disease. In such cases, pediatricians recommend examining the baby's neck. If slight redness is detected on the tonsils, then most likely after a day or two other symptoms will join the temperature. Parents should know what diseases are preceded by fever, which in most cases increases closer to night.

Inflammatory process. Pathogenic bacteria, entering the body, cause a response. The defenses begin to fight pathogenic microbes, as a result of which the temperature begins to rise.

Teething. Most often, the process of teething is accompanied by a slight increase in temperature and, as a rule, closer to night the child begins to be capricious, refuses to eat, and sleeps poorly.

Reaction to vaccination. The temperature may rise after vaccination, especially if a live vaccine was administered.

Allergic reaction. The body may react to the allergen by increasing its temperature. Allergens can be pet hair, aquarium fish food, food products, etc.

Overheat. A child can overheat not only in the sun. Overheating can be caused even if the child was in a stuffy room, in a car, or in a stroller.

Another factor that can trigger a rise in temperature is parental panic. When a child is sick, parents should remain calm, at least in front of the baby. He doesn't need to see your anxiety and helpless state. Mothers especially often panic after taking their child’s temperature at night. Knowing full well that the temperature can rise in the evening, parents become afraid of even a slight increase in body temperature. As a result, the parents’ anxiety is somehow transmitted to the baby and, due to emotional stress, his temperature can even rise to 39°C. Therefore, parental calm and adequate behavior are the key to healthy sleep and well-being of your baby.

Stressful situations can also include preparing a child for the next performance in the garden, for a sports competition or other exciting events. Having noticed such a reaction of the body once, parents should prevent it the next time, suggesting in advance that the child take a sedative prescribed by the doctor.

How parents should behave

For some reason, it is generally accepted that the temperature can only rise if the child has a cold. But the temperature, especially in infants, can rise for a number of other reasons. A child may become capricious when overheated, or become lethargic and overly calm. But, such a symptom as an increase in body temperature will be present in both cases. Therefore, measure the temperature correctly and take all appropriate measures in case you suspect that the child’s strange behavior and elevated temperature are the result of overheating.

1. Ventilate the room well.

2. Remove excess clothing from the child.

3. Wipe the body with a diaper, having previously moistened it in water at a temperature of 36°C.

4. Try to give your baby something to drink.

In this case, there is no need to give the baby antipyretic drugs. If parents act correctly, the fever will disappear on its own after 1 hour.

Without obvious symptoms, childhood infectious diseases can also cause fever. Only a doctor can determine the correct diagnosis and prescribe the correct treatment.

If you see that your child's body temperature rises in the evening, then the best thing you can do is to monitor the child's condition. At the same time, you must take all necessary measures to ensure that the child is comfortable.

When to call a doctor

Never self-medicate. And especially if there are no other symptoms, and only an elevated temperature may indicate that the child is unwell.

However, parents should understand when to call an ambulance immediately.

For symptoms of seizures associated with high fever,

If your baby has pale skin and lethargy,

When, after taking antipyretic drugs, the temperature does not decrease, but increases,

If you have an allergic reaction to the drug.

Dr. Komarovsky argues that elevated body temperature is not always associated with illness. Sometimes such a symptom in children may indicate that their body’s thermoregulation is not fully formed.

EVERYONE should know about this! UNBELIEVABLE BUT TRUE! Scientists have developed a unique remedy that helps restore immunity and prepare it for various attacks of influenza viruses and even restore it if you are already sick. Spring is coming - this is the time when flu activity increases due to a lack of vitamins, and to protect yourself and the whole family, scientists advise drinking an effective means of prevention and protection against infection in the air. In order to avoid complications, parents, taught by bitter experience, use it to strengthen their child’s immunity.

To correctly measure your body temperature and make sure that it is indeed elevated, always choose a place under your armpit. And only after you actually see an increased reading on the thermometer, can you take adequate measures and, if necessary, call a doctor, even if it is midnight.

Reasons for increased body temperature in the evening

Why does body temperature rise in the evening?

For a healthy person, normal values ​​are 36.6°C. Temperature may change throughout the day. In the evening, the readings may increase by about 0.4°C or a little more, and at night they may decrease, because the body is resting.

Reasons for rising temperature:

• active lifestyle;
• eating hot food (temperature rises immediately after eating);
• daytime sun exposure;
• stress;
• inhalation of harmful substances and chemicals;
• taking certain medications;
• teething;
• overheating, too warm clothes;
• alcohol consumption;
• taking a bath.

All these factors affect body temperature and do not pose a threat.

During pregnancy or before the onset of menstruation, levels can reach 37.2−37.5°C. A higher temperature indicates inflammatory processes in the body.

Dangerous increase in body temperature in the evening

If your body temperature rises in the evening, this indicates the following problems:

• the onset of a cold;
• chronic fatigue and exhaustion;
• inflammatory process in the body;
• a recent illness when the immune system is suppressed.

The temperature begins to rise in the evening, because the immune system's defenses weaken by then.

When exhausted, regularly lacking sleep, or after a serious illness, the immune system is vulnerable, which is why the body temperature rises. Vitamin complexes and rest will help to recover.

When a cold begins, the immune system immediately begins to fight pathogens, which is accompanied by an increase in temperature. If the readings reach above 38°C, you cannot do without medication. The cause is a cold, rheumatism, kidney inflammation or intestinal infections.

In order not to feel tired at the end of the day, it is necessary to correctly create a daily routine and evenly distribute the load. By evening, the body is exhausted and susceptible to viruses. In this case, it is difficult for the immune system to fight microorganisms, so the person gets sick.

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Why does the temperature rise to 37 degrees in the evening? Causes and diagnosis

And sometimes the body temperature remains normal throughout the day, but invariably rises in the evening. This phenomenon does not always indicate the development of the disease, but it still indicates certain changes in the human body. For some people, such changes generally become a normal condition, because this is how their thermoregulatory system functions. And yet you should very carefully consider the reasons for the appearance of such numbers on the thermometer.

Every evening the temperature rises to 37 degrees in adults and children for a variety of reasons. The indicators will be influenced by various factors: physiological and pathological. Of course, if you have any complaints about your own health, you should consult a doctor. But sometimes a temperature of 37.1 (in the evening) does not mean something terrible, but is a variant of the norm.

But if such symptoms continue for a long time, you need to see a doctor. Most likely, this condition indicates an immune response to a certain threat or disadvantage.

What can affect the temperature change in the evening?

A person rarely resorts to using a thermometer unless there are additional health complaints or signs of illness. But after taking periodic measurements, you may be surprised that there is a temperature of 37 in the evening, but not in the morning. The thermometer readings are influenced by many factors:

• time of day (it is known that in the morning the thermometer readings are lower than in the evening, and during deep sleep the lowest values ​​are observed);
• rhythm of life (people with an active lifestyle have higher thermometer readings);
• type of measuring device (it is generally accepted that electronic thermometers have an error, unlike mercury devices);
• time of year and weather conditions (in winter the temperature naturally rises, and in summer it becomes lower);
• physiological and pathological conditions.

Physiological conditions that increase temperature

Hyperthermia does not always occur due to a specific threat. Very often it is a consequence of overload or hormonal changes in the body.

This can happen due to ingestion of hot or spicy food, nervous stress, and the prescription of certain medications.

Sometimes such numbers are not considered a pathology at all, but only a borderline state of the norm. Only in the case of a strong increase in them or an unacceptably long period of hyperthermia is a comprehensive examination of the patient’s body prescribed.

Among women

Many women periodically experience increased body temperature. This is why this happens. Hormones are constantly produced during the menstrual cycle.

On certain days, the release of some substances becomes greater and others less. Immediately after ovulation (the release of an egg from the ovary), progesterone comes into play.

This hormone is very important for maintaining the second phase of the cycle and the development of pregnancy. Thanks to it, smooth muscles relax. Progesterone also affects thermoregulation and reduces the rate of heat transfer.

Before menstruation, a woman may notice that her body temperature has increased by a fraction of a degree.

As soon as bleeding begins, progesterone levels will decrease and the thermometer readings will return to normal. If pregnancy has occurred, elevated values ​​may persist for several months until the placenta is formed. For expectant mothers, it is considered normal if the thermometer shows 37-37.2 degrees.

A rise in temperature in the evenings is usually explained by a sharp hormonal change in the body, toxicosis during pregnancy, an increase in metabolic rate, reflex effects when drinking alcoholic beverages, or normal thermoregulation processes.

Reasons why the temperature rises to 37 in the evening:

• during premenstrual syndrome
• during pregnancy
• when feeding a baby
• during ovulation
• shortly after the birth of children
• during menopause
• after eating too much and too much food
• with excessive consumption of strong alcoholic drinks
• with significant overheating in the sun, etc.

For some women, such a temperature is generally normal, accompanying them throughout their lives. For other ladies, the numbers often change in the evening due to increased fatigue or severe nervous tension.

In men

Representatives of the stronger sex also often complain that in the evening the temperature rises to 37 degrees without symptoms. This may be a consequence of hypothermia or overheating, injury, or nervous strain. Hyperthermia can occur due to excessive consumption of spicy foods or addiction to alcoholic beverages.

The temperature may rise in the evening due to significant muscle strain after heavy physical work or intense sports training.

The most common cause could be taking a long bath or shower that is too hot, sleeping for a long time in a chair next to the radiator, or wearing a very warm dressing gown or suit.

In older people, temperature fluctuations may have their own characteristics. During the day, for example, there will be some hypothermia, and by the evening the numbers will creep up to around 37 degrees.

In addition, in men, as in women, such indicators can be quite normal and correspond to their physiological norm.

In children

A child often causes his parents great anxiety due to the temperature rising in the evening.

However, it is worth noting that in children under five years of age, due to their imperfect thermoregulation, a normal temperature can be considered 37.2 - 37.3 degrees.

Most often, an increase in temperature at night occurs shortly after an infection or other childhood illness. The baby’s immunity is not yet fully strengthened, so his circulatory system reacts with an increased release of lymphocytes, accompanied by hyperthermia.

This is a normal reaction, indicating that the protective forces of the child’s body are guarding his health.

A rise in temperature in the evening to 37 in a child can also be explained by the most common reasons:

• Overly active games
• clothes that are too warm
• reaction to vaccination
• teething
• hot drink at night
• too warm blanket
• change of biorhythms
• a hearty dinner
• unsettled metabolism, etc.

In newborns and premature babies, a temperature of thirty-seven degrees in the evening is not uncommon and is associated with the formation of normal thermoregulation processes in the baby’s body.

Such reasons are the most common and all parents face them.

An overly sensitive child's temperature may rise even when crying a lot or watching an interesting movie.

The baby’s digestive system can also react with an abundant release of enzymes and active intestinal activity, which is why the temperature rises to 37 in the evening.

Therefore, children’s temperature is measured only after special preparation. The thermometer should be placed at the same time under the same conditions.

Sufficient time should pass after the cessation of all activity, the child should be calm and relaxed. The baby's armpit should be allowed to dry completely, and he should not be allowed to sweat. It is advisable to measure the temperature before dinner and water procedures.

Eating

Another physiological reason for an increase in thermometer readings is food. It is recommended to measure your temperature no earlier than half an hour after eating. The fact is that when eating, the body expends heat, so it constantly compensates for it.

A noticeable increase in temperature occurs in individuals with good metabolism. Most people don't feel these changes, but if you take your temperature immediately after eating, you'll be surprised.

Since a larger meal occurs in the evening (dinner), the increase in temperature at this time of day becomes more pronounced.

Overwork

It is known that at night the thermometer readings become significantly lower. This is facilitated by decreased activity and low energy consumption. However, in the evening the indicators, on the contrary, become higher. This happens due to overwork, overexertion, and stress.

There is such a thing as chronic fatigue syndrome. In people with this diagnosis, the temperature may rise for no reason throughout the day.

Most often in the evening there is a temperature of 37-37.2 and weakness, headache. If during rest and deep sleep the indicators do not become lower, then it is worth thinking about the presence of a pathological cause of this condition.

Reasons for rising temperature

Not always, when the thermometer registers thirty-seven, this only speaks of harmless functional reasons. Often such numbers indicate the development of a disease.

Such jumps may be the first symptom:

• Helminthiasis
• inflammatory process in the body
• introduction of infection
• development of malignant neoplasm
• cardiovascular pathology
• allergies
• neurological diseases
• rheumatism
• arthritis
• endocrine diseases
• development of mental pathologies

When an increase in body temperature is recorded in the evening, the reasons can be very different. They may be associated with intoxication by cell breakdown products, the fight against pathogenic microorganisms, or impaired neuromuscular conduction.

It is also possible to become infected with infectious diseases, so consulting a doctor in this case is mandatory.

Pathological conditions

If a person’s temperature rises to 37 in the evening, this may be an alarm bell. There are many pathological causes for this condition, but they all usually have additional symptoms. Busy people leading an active lifestyle may not even notice them.

Colds

The most common symptom of a cold is an increase in temperature. In this way, the human body tries to cope with the infectious agent. It is known that viruses die when the thermometer reaches 38 degrees. Therefore, you should not lower your temperature to 37. Allow your body to eliminate the infection on its own and build immunity.

Consequences of infection

Many infectious diseases occur with elevated temperature. But what if you are already healthy and it still continues to rise? Such an outcome is also possible. It is in the evening that the thermometer increases noticeably.

Especially often, such symptoms are due to chickenpox, acute intestinal infection, bacterial pathologies. Don't worry, your body will regain its strength in the near future. Such temperature indicators do not require the use of antipyretics. After a night's rest, they return to normal on their own.

Arterial pressure

Hypertensive patients often complain that they have an elevated body temperature. Such a natural consequence of high pressure cannot be called natural, but it is not entirely correct to consider it pathological either. As soon as the patient brings the blood pressure back to normal, the thermometer shows lower numbers.

Hypotonics, on the contrary, have a low body temperature. For some people it drops to 36 degrees. It is very important not to miss the moment. But if such a condition does not cause discomfort, then you can not try to fix it.

This abbreviation stands for vegetative-vascular dystonia. Until now, this disease remains incompletely studied. Many doctors refute it, saying that a person is dealing with chronic fatigue syndrome. One way or another, with vegetovascular dystonia, an increase in the thermometer readings occurs. A person may note that in the morning the temperature is 36, in the evening – 37.

Oncological pathologies

It is the evening increase in the values ​​of the thermometer that often makes a person turn to specialists. During the examination, tumor processes may be detected.

Benign neoplasms often do not make themselves felt like a symptom. But the reproduction of cancer cells affects the lymphatic system, so a slight increase in the mercury meter is the first wake-up call.

Immune diseases

Any deviations in the work of the immune system and the protective functions of the body affect the temperature values. They become higher with the following pathologies:

1. allergy;
2. rheumatic diseases;
3. blood pathologies;
4. system deviations.

Many diseases develop due to the increased immune work of the body, which provokes inflammation of a different nature.

What is low-grade fever, and how to deal with it?

Low-grade fever is an unreasonable increase in the temperature of the human body. In such cases, the readings do not exceed 37.5 degrees.

The temperature lasts for months or even years. This distinguishes it from the course of acute pathological diseases or physiological causes of the increase.

The main sign of subfebrile condition is that a person has an elevated body temperature. This disease accompanies:

• increased fatigue;
• drowsiness and weakness;
• decreased appetite;
• redness of the skin;
• disorders of the digestive system;
• increased sweating;
• rapid pulse;
• neuroses and insomnia.

Both a specialist and the patient himself can pre-diagnose the problem. But with low-grade fever, additional research is necessary. To do this, consult a doctor and find out why the temperature rises to 37 in the evening.

Diagnosis of low-grade fever

Before making a diagnosis, the specialist must examine the patient. The condition of the mucous membranes, the functioning of the respiratory system are studied, and the abdominal organs are palpated.

Defects in joints and lymph nodes are detected. Women undergo a gynecological examination and palpation of the mammary glands, and the menstrual cycle is studied. Anamnesis collection is carried out in several stages.

The doctor determines the following:

1. whether there have been surgical interventions or injuries in the recent past (for women - childbirth and abortion);
2. what infectious diseases have been suffered during life and whether there are chronic pathologies (particular attention is paid to diabetes, HIV, liver and blood diseases);
3. the possibility of hepatitis and bacterial endocarditis.

Usually, already at the examination stage, the specialist notices a rash on the body, a change in the color of the skin, uncharacteristic discharge or formations.

Therefore, to confirm his hypothesis, he prescribes a series of tests showing the state of the blood picture, the possible presence of severe infectious chronic diseases or helminthic infestation.

To do this, the specialist will send the patient for laboratory tests.

To clarify the reason why his temperature is always 37 in the evening, you need to go through:

• clinical and biochemical blood test
• four mandatory tests (HIV, syphilis, hepatitis B and C)
• allergen panel
• general urine analysis
• stool analysis for worm eggs and protozoan cysts
• sputum microscopy
• discharge from the urethra and genitals
• biopsy
• spinal puncture.

The results obtained help identify helminthiasis, inflammatory processes or allergic reactions.

For the purpose of differential diagnosis, it is also necessary to do fluorography, radiography, ultrasound scanning, ECG, EEG, CT, MRI, as well as conduct special targeted studies. All this quickly makes it possible to identify tuberculosis, diseases of the heart, blood vessels, liver and kidneys, malignant neoplasms, which often cause an increase in temperature in the evening.

The specialist receives final confirmation of the diagnosis by conducting instrumental studies. For this, mammography, FGDS, angiography, ultrasonography, etc. are used.

They quite accurately allow you to identify the disease due to which there is a regular rise in temperature, as they show the condition of the patient’s internal organs. In addition, they make it possible to correlate the general picture of the disease with the altered thermal regime.

Let's summarize

An increase in body temperature in the evening can be caused by many reasons. If you have been experiencing an increase in thermometer readings for a long time, then this is a serious reason for examination. Don't ignore your own complaints. Be sure to consult a doctor and find out why your temperature rises in the evening.

Body temperature is an important indicator of the functioning of the body. If its value changes, this may be a consequence of either natural or pathological processes occurring in the body.

Moreover, its minimum value occurs in the morning (4-5 hours), and the maximum value is reached at approximately 17 hours.

If the temperature jumps during the day (36 - 37 degrees) this is explained by the physiological state of systems and organs, when an increase in temperature values ​​is necessary to activate their work.

When the body is at rest, a decrease in body temperature occurs, so jumps from 36 to 37 degrees during the day are regarded as normal.

The human body is a heterogeneous physical environment where areas are heated and cooled differently.

Contrary to popular belief, measuring temperature in the armpit may be the least informative, and this often causes unreliable results.

In addition to the armpit, body temperature can be measured:

• in the ear canal
• in the oral cavity,
• rectum.

Medicine distinguishes between several types of temperature. An elevated temperature is considered to be 37.5 degrees, at which there are other uncomfortable manifestations.

Fever is a temperature of unknown origin, in which the only symptom is a prolonged rise in temperature from 38 degrees. The condition lasts 14 days or more.

Subfebrile temperature is considered to be up to 38.3 degrees. This is a condition of unknown origin in which a person periodically has a fever without additional symptoms.

Specificity of physiological conditions

In addition to wakefulness and sleep, temperature fluctuations during the day are caused by the following processes:

• overheating,
• active physical activity,
• digestive processes,
• psycho-emotional arousal.

In all of these cases, temperature jumps from 36 to 37.38 degrees can be observed. The condition does not require correction, since the increase in temperature occurs against the background of the natural physiological states of the body.

The exception is cases when temperature jumps from 36 to 37 degrees are accompanied by additional symptoms, namely:

1. headache,
2. discomfort in the heart area,
3. the appearance of a rash,
4. shortness of breath
5. dyspeptic complaints.

If you have these symptoms, you should consult your doctor to rule out the development of allergic reactions, vegetative-vascular dystonia and endocrine disorders.

Among other things, physiological specifics also determine jumps in overall body temperature during pregnancy. At this time, significant changes in the hormonal background occur, since progesterone is produced in large quantities, which leads to jumps in body temperature from 36 to 37 degrees.

As a rule, changes in temperature indicators are observed in the first trimester, but there are cases when the condition continues throughout pregnancy, and the reasons should be determined.

Changes in body temperature pose an additional danger if you have:

• catarrhal phenomena,
• dysuric signs,
• stomach ache,
• rashes on the body.

Consultation with doctors is indicated to exclude diseases caused by pathogenic agents.

Ovulation can also change a woman's body temperature from 36 to 37 degrees. Typically, the following symptoms are present:

1. irritability,
2. weakness,
3. headache,
4. increased appetite,
5. swelling.

If in the first days of menstruation these unpleasant symptoms disappear and the temperature drops to 36 degrees, then there is no need for medical examinations.

Also, the indicator may change during menopausal syndrome, which is also caused by changes in the amount of hormones. The woman does not understand why her condition has changed. There are additional complaints:

• hot flashes,
• increased sweating,
• increased blood pressure,
• disruptions in the functioning of the heart.

Such temperature changes are not dangerous, but if there are other complaints and the cause is determined, in some cases hormone replacement therapy is indicated.

Temperature jumps can occur with thermoneurosis, that is, a rise in temperature to 38 degrees after stress. It is possible to draw a conclusion about the presence of this pathology by excluding more significant causes for the appearance of hyperthermia.

Sometimes it may be indicated to perform an aspirin test, which involves taking an antipyretic drug at a high temperature, and then monitoring the dynamics.

If the indicators are stable, then 40 minutes after taking the drug, one can more confidently assert the presence of thermoponeurosis. In this case, treatment will consist of prescribing general restorative procedures and sedatives.

The most common causes of temperature fluctuations from 36 to 37 degrees in adults are:

1. heart attacks,
2. purulent and infectious processes,
3. tumors
4. inflammatory diseases,
5. autoimmune conditions,
6. injuries,
7. allergies,
8. endocrine pathologies,
9. hypothalamic syndrome.

Abscess, tuberculosis and other infectious processes are most often the reasons why there is a change in temperature from 36 to 38 degrees. This is due to the pathogenesis of the disease.

When tuberculosis develops, fluctuations between evening and morning temperatures often reach several degrees. If we are talking about severe cases, then the temperature curve has a hectic shape.

This picture is also characteristic of purulent processes. In such a situation, the temperature rises to 38 degrees and above. When the infiltrate is opened, the indicator returns to normal in a short time.

Also, most other inflammatory and infectious diseases have such a symptom as sudden changes in temperature during the day. It is lower in the morning and higher in the evening.

The temperature may rise in the evening if chronic processes such as:

• adnexitis,
• sinusitis,
• pharyngitis,
• pyelonephritis.

Hyperthermia in these cases occurs with additional unpleasant symptoms, so you should consult a doctor for examination and treatment for a specific disease. Treatment with antibiotics, which is often prescribed for inflammatory diseases, will help normalize temperature indicators.

If hyperthermia is caused by a tumor process, then depending on its location, it proceeds differently. So, there may be sudden temperature changes or it will remain at a constant level for a long time.

To clarify the diagnosis, a comprehensive examination should be carried out, which includes:

• hardware methods
• instrumental analysis,
• laboratory diagnostics.

A timely diagnosis will lead to effective treatment of the disease. This approach is also used in hematology, where temperature jumps from 37 to 38 degrees can occur due to various forms of anemia or leukemia.

Temperature jumps can be observed due to the pathology of the endocrine system. If there is thyrotoxicosis, which occurs with hyperfunction of the thyroid gland, then the following additional symptoms should serve for consultation with an endocrinologist:

1. weight loss,
2. irritability,
3. sudden mood changes,
4. tachycardia,
5. interruptions in heart function.

In addition to general clinical tests, ultrasound and ECG, a study of thyroid hormones is prescribed, then a treatment regimen is created.

Principles of therapy

As you know, in order to prescribe the optimal treatment, it is necessary to identify the cause of the onset of symptoms. At elevated temperatures, the patient is examined.

When the diagnosis is confirmed, treatment should be prescribed directly based on the characteristics of the pathology. It can be:

• antibiotic therapy,
• antiviral agents,
• anti-inflammatory drugs,
• antihistamines,
• hormone therapy,
• general strengthening measures,

An increase in temperature is a protective reaction that allows the body to effectively and quickly fight pathogenic elements.

The prescription of antipyretics is not justified if the temperature is up to 37 degrees. In most cases, antipyretic medications are prescribed at temperatures above 38 degrees.

Drinking plenty of warm fluids is also recommended, which increases sweating and promotes heat transfer. It is necessary to provide cool air in the room where the patient is located. Thus, the patient’s body will have to warm the inhaled air, while giving off heat.

As a rule, thanks to the actions taken, the temperature drops by a degree, which means the patient’s well-being improves, especially with colds.

Conclusion

Based on the above, it is worth emphasizing that temperature jumps can be seen in both physiological and pathological conditions. To confirm the safety of hyperthermia, many diseases must be excluded.

If a person has a body temperature of 37 to 38 degrees, within a few days you need to seek medical advice and undergo a medical examination. If a pathogenic agent is identified, therapeutic procedures must be started immediately. The interesting video in this article logically completes the topic of temperature.

Body temperature is one of the most important physiological parameters indicating the state of the body. Since childhood, we all know well that the normal body temperature is +36.6 ºC, and a temperature increase of more than +37 ºC indicates some kind of disease.

What is the reason for this condition? An increase in temperature is a reaction of the immune system to infection and inflammation. The blood is saturated with temperature-raising (pyrogenic) substances produced by pathogenic microorganisms. This in turn stimulates the body to produce its own pyrogens. The metabolism speeds up somewhat to make it easier for the immune system to fight the disease.

Typically, fever is not the only symptom of the disease. For example, with colds, we feel typical symptoms for them - fever, sore throat, cough, runny nose. For mild colds, body temperature can be at +37.8 ºC. And in case of severe infections, such as influenza, it rises to + 39-40 ºC, and aches all over the body and weakness can be added to the symptoms.

Photo: Ocskay Bence / Shutterstock.com

In such situations, we know very well how to behave and how to treat the disease, because its diagnosis is not difficult. We gargle, take anti-inflammatory drugs and antipyretics, if necessary - drink, and the disease gradually disappears. And after a few days the temperature returns to normal.

Most of us have encountered this situation more than once in our lives. However, it happens that some people experience slightly different symptoms. They find that their temperature is higher than normal, but not by much. We are talking about low-grade fever - a temperature in the range of 37-38 ºC.

Is this condition dangerous? If it does not last long - for a few days, and you can associate it with some kind of infectious disease, then no. It is enough to cure it, and the temperature will subside. But what if there are no visible symptoms of a cold or flu?

Here you need to keep in mind that in some cases colds may have mild symptoms. Infection in the form of bacteria and viruses is present in the body, and the immune forces react to their presence by increasing the temperature. However, the concentration of pathogenic microorganisms is so low that they are unable to cause typical cold symptoms - cough, runny nose, sneezing, sore throat. In this case, the fever may go away after these infectious agents are killed and the body recovers.

Especially often, a similar situation can be observed in the cold season, during epidemics of colds, when infectious agents can attack the body over and over again, but run into the barrier of an alert immune system and do not cause any visible symptoms, except for an increase in temperature from 37 to 37 ,5. So if you have 4 days of 37.2 or 5 days of 37.1, and you still feel tolerable, this is not a reason to worry.

However, as is known, they rarely last more than one week. And, if the elevated temperature lasts longer than this period and does not subside, and no symptoms are observed, then this situation is a reason to seriously think about it. After all, a constant low-grade fever without symptoms can be a harbinger or sign of many serious diseases, much more serious than a common cold. These can be diseases of both infectious and non-infectious nature.

Measurement technique

However, before worrying in vain and running to doctors, you should rule out such a banal cause of low-grade fever as measurement error. After all, it may well happen that the cause of the phenomenon lies in a faulty thermometer. As a rule, electronic thermometers, especially cheap ones, are guilty of this. They are more convenient than traditional mercury ones, however, they can often show incorrect data. However, mercury thermometers are not immune to errors. Therefore, it is better to check the temperature on another thermometer.

Body temperature is usually measured in the armpit. Rectal and oral measurements are also possible. In the last two cases, the temperature may be slightly higher.

The measurement should be carried out while sitting, at rest, in a room with normal temperature. If the measurement is taken immediately after intense physical activity or in an overheated room, then the body temperature may be higher than normal. This circumstance should also be taken into account.

One should also take into account such a circumstance as temperature changes during the day. If in the morning the temperature is below 37, and in the evening the temperature is 37 and slightly higher, then this phenomenon may be a variant of the norm. For many people, the temperature may vary slightly during the day, rising in the evening hours and reaching values ​​of 37, 37.1. However, as a rule, the evening temperature should not be low-grade. In a number of diseases, a similar syndrome, when the temperature is higher than normal every evening, is also observed, so in this case it is recommended to undergo an examination.

Possible causes of prolonged low-grade fever

If you have an elevated body temperature without symptoms for a long time, and you do not understand what this means, you should consult a doctor. Only a specialist, after a thorough examination, can say whether this is normal or not, and if it is abnormal, then what caused it. But, of course, it’s good to know for yourself what can cause such a symptom.

What body conditions can cause prolonged low-grade fever without symptoms:

• variant of the norm
• hormonal changes during pregnancy
• thermoneurosis
• temperature tail of infectious diseases
• oncological diseases
• autoimmune diseases - lupus erythematosus, rheumatoid arthritis, Crohn's disease
• toxoplasmosis
• brucellosis
• helminthic infestations
• latent sepsis and inflammatory processes
• foci of infection
• thyroid diseases
• drug therapy
• intestinal diseases
• viral hepatitis
• Addison's disease

Norm variant

Statistics say that 2% of the Earth's population has a normal temperature of just above 37. But if you have not had such a temperature since childhood, and low-grade fever has appeared only recently, then this is a completely different case, and you are not included in this category of people.

Photo: Billion Photos/Shutterstock.com

Pregnancy and lactation

Body temperature is regulated by hormones produced in the body. At the beginning of such a period of a woman’s life as pregnancy, a restructuring of the body occurs, which, in particular, is expressed in an increase in the production of female hormones. This process can cause the body to overheat. As a general rule, a temperature of around 37.3ºC for pregnancy should not cause serious concern. In addition, the hormonal levels subsequently stabilize, and the low-grade fever goes away. Typically, starting from the second trimester, a woman's body temperature stabilizes. Sometimes low-grade fever can accompany the entire pregnancy. As a rule, if an elevated temperature is observed during pregnancy, then this situation does not require treatment.

Inogirmonov.

Thermoneurosis

Body temperature is regulated in the hypothalamus, one of the parts of the brain. However, the brain is an interconnected system and processes in one part of it can affect another. Therefore, a phenomenon is very often observed when, during neurotic conditions - anxiety, hysteria - the body temperature rises above 37. This is also facilitated by the production of increased amounts of hormones during neuroses. Long-term low-grade fever can accompany stress, neurasthenic conditions, and many psychoses. With thermoneurosis, the temperature usually normalizes during sleep.

To exclude such a cause, it is necessary to consult a neurologist or psychotherapist. If you really have neurosis or anxiety associated with stress, then you need to undergo a course of treatment, since shattered nerves can cause much greater problems than low-grade fever.

Temperature "tails"

One should not discount such a banal reason as a trace from a previously suffered infectious disease. It is no secret that many flus and acute respiratory infections, especially severe ones, bring the immune system into a state of increased mobilization. And if infectious agents are not completely suppressed, the body can maintain an elevated temperature for several weeks after the peak of the disease. This phenomenon is called a temperature tail. It can be observed in both adults and children.

Photo: Aleksandra Suzi/Shutterstock.com

Therefore, if the temperature of + 37 ºС and above lasts for a week, then the causes of the phenomenon may lie precisely in a previously suffered and cured (as it seemed) illness. Of course, if you were ill shortly before the discovery of a constant low-grade fever with some kind of infectious disease, then there is nothing to worry about - low-grade fever is precisely its echo. On the other hand, such a situation cannot be called normal, since it indicates the weakness of the immune system and the need to take measures to strengthen it.

Oncological diseases

This reason also cannot be discounted. Often, low-grade fever is the earliest sign of a tumor. This is explained by the fact that the tumor releases pyrogens into the blood - substances that cause an increase in temperature. Low-grade fever especially often accompanies blood cancer - leukemia. In this case, the effect is caused by a change in blood composition. To exclude such diseases, it is necessary to undergo a thorough examination and take a blood test. The fact that a persistent increase in temperature can be caused by such a serious disease as cancer makes us take this syndrome seriously.

Autoimmune diseases

Autoimmune diseases are caused by an abnormal response of the human immune system. As a rule, immune cells - phagocytes and lymphocytes attack foreign bodies and microorganisms. However, in some cases, they begin to perceive the cells of their body as foreign, which leads to the appearance of the disease. In most cases, connective tissue is affected.

Almost all autoimmune diseases - rheumatoid arthritis, systemic lupus erythematosus - are accompanied by an increase in temperature to 37 and above without symptoms. Although these diseases usually have a number of manifestations, they may not be noticeable at an early stage. To rule out such diseases, you need to be examined by a doctor.

Toxoplasmosis

Toxoplasmosis is a very common infectious disease that often occurs without noticeable symptoms, except for fever. It often affects owners of pets, especially cats, which are carriers of the bacilli. Therefore, if you have furry pets at home and the temperature is low-grade, then this is reason to suspect this disease. The disease can also be contracted through undercooked meat. To diagnose toxoplasmosis, you should take a blood test to check for infection. You should also pay attention to symptoms such as weakness, headaches, and loss of appetite. The temperature with toxoplasmosis cannot be reduced with the help of antipyretics.

Brucellosis

Brucellosis is another disease caused by an infection transmitted through animals. But this disease most often affects farmers who deal with livestock. The disease in the initial stage is expressed in a relatively low temperature. However, as the disease develops, it can take on severe forms, affecting the nervous system. However, if you do not work on a farm, then brucellosis can be ruled out as a cause of hyperthermia.

Tuberculosis

Alas, consumption, notorious in works of classical literature, has not yet become part of history. Millions of people currently suffer from tuberculosis. And this disease is now characteristic not only of places that are not as remote as many believe. Tuberculosis is a severe and persistent infectious disease that is difficult to treat even with modern medicine.

However, the effectiveness of treatment largely depends on how quickly the first signs of the disease were detected. The earliest signs of the disease include low-grade fever without other clearly defined symptoms. Sometimes temperatures above 37 ºC may not be observed all day, but only in the evening hours. Other symptoms of tuberculosis include increased sweating, fatigue, insomnia, and weight loss. To accurately determine whether you have tuberculosis, you need to perform a tuberculin test () and also do fluorography. It should be borne in mind that fluorography can only reveal the pulmonary form of tuberculosis, while tuberculosis can also affect the genitourinary system, bones, skin and eyes. Therefore, you should not rely only on this diagnostic method.

AIDS

Until about 20 years ago, a diagnosis of AIDS meant a death sentence. Now the situation is not so sad - modern drugs can support the life of an HIV-infected person for many years, or even decades. It is much easier to become infected with this disease than is commonly believed. This disease does not only affect representatives of sexual minorities and drug addicts. You can catch the immunodeficiency virus, for example, in a hospital through a blood transfusion or through casual sexual contact.

Constant low-grade fever is one of the first signs of the disease. Note. that in most cases, weakened immunity in AIDS is accompanied by other symptoms - increased susceptibility to infectious diseases, skin rashes, and bowel dysfunction. If you have reason to suspect AIDS, you should consult a doctor immediately.

Worm infestations

Latent sepsis, inflammatory processes

Often, an infection in the body can be hidden and not show any signs other than fever. Foci of a sluggish infectious process can be located in almost any organ in the cardiovascular system, gastrointestinal tract, skeletal and muscular systems. The urinary organs are most often affected by inflammation (pyelonephritis, cystitis, urethritis). Often, low-grade fever can be associated with infective endocarditis, a chronic inflammatory disease affecting the tissues surrounding the heart. This disease can be latent for a long time and not manifest itself in any other way.

Also, special attention should be paid to the oral cavity. This area of ​​the body is particularly vulnerable to the effects of pathogenic bacteria because they can enter it regularly. Even simple untreated caries can become a source of infection, which will enter the bloodstream and cause a constant protective response of the immune system in the form of an increase in temperature. The risk group also includes patients with diabetes mellitus, who may experience non-healing ulcers that make themselves felt through increased temperature.

Thyroid diseases

Thyroid hormones, such as thyroid-stimulating hormone, play an important role in regulating metabolism. Some thyroid diseases can increase the release of hormones. The increase in hormones may be accompanied by symptoms such as increased heart rate, weight loss, hypertension, inability to tolerate heat, deterioration of hair, and increased body temperature. Nervous disorders are also observed - increased anxiety, restlessness, absent-mindedness, neurasthenia.

An increase in temperature can also be observed with a lack of thyroid hormones.

To exclude an imbalance of thyroid hormones, it is recommended to take a blood test to determine the level of thyroid hormones.

Addison's disease

This disease is quite rare and is expressed in a decrease in the production of hormones by the adrenal glands. It develops for a long time without any special symptoms and is also often accompanied by a moderate increase in temperature.

Anemia

A slight increase in temperature can also cause a syndrome such as anemia. called a lack of hemoglobin or red blood cells in the body. This symptom can manifest itself in various diseases, and is especially characteristic of severe bleeding. Also, an increase in temperature can be observed with some vitamin deficiencies, lack of iron and hemoglobin in the blood.

Drug treatment

With low-grade fever, the cause of the phenomenon may be due to medication. Many medications can cause fever. These include antibiotics, especially penicillin drugs, some psychotropic substances, in particular neuroleptics and antidepressants, antihistamines, atropine, muscle relaxants, narcotic analgesics. Very often, an increase in temperature is one of the forms of an allergic reaction to the drug. This version is perhaps the easiest to check - just stop taking the drug that causes suspicion. Of course, this must be done with the permission of the attending physician, since discontinuation of the drug can lead to much more serious consequences than low-grade fever.

Age up to one year

In infants, the causes of low-grade fever may lie in the natural processes of development of the body. As a rule, a person's temperature in the first months of life is slightly higher than that of adults. In addition, infants may experience disturbances in thermoregulation, which is expressed in a slight low-grade fever. This phenomenon is not a symptom of pathology and should go away on its own. Although, when the temperature rises in infants, it is still better to show them to the doctor to rule out infections.

Intestinal diseases

Many infectious intestinal diseases may be asymptomatic, except for an increase in temperature above normal values. Also, a similar syndrome is characteristic of some inflammatory processes in gastrointestinal diseases, for example, in nonspecific ulcerative colitis.

Hepatitis

– severe viral diseases affecting the liver. As a rule, long-term low-grade fever accompanies sluggish forms of the disease. However, in most cases it is not the only symptom. Typically, hepatitis is also accompanied by heaviness in the liver area, especially after eating, yellowing of the skin, pain in the joints and muscles, and general weakness. If you suspect hepatitis, you should consult a doctor as soon as possible, since prompt treatment reduces the likelihood of severe, life-threatening complications.

Diagnosis of the causes of prolonged low-grade fever

As you can see, there are a huge number of potential causes that can cause disruption of the body’s thermoregulation. And finding out why it happens is not easy. This can take a lot of time and require significant effort. However, there is always something from which such a phenomenon is observed. And an elevated temperature always indicates something, usually that something is wrong with the body.

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As a rule, it is impossible to determine the cause of low-grade fever at home. However, some conclusions about its nature can be drawn. All the reasons that cause elevated temperature can be divided into two groups - those associated with some kind of inflammatory or infectious process and those not associated with it. In the first case, taking antipyretic and anti-inflammatory drugs, such as aspirin, ibuprofen or paracetamol, can restore normal temperature, albeit for a short time. In the second case, taking such drugs does not give any effect. However, one should not think that the absence of inflammation makes the cause of low-grade fever less serious. On the contrary, non-inflammatory causes of low-grade fever may include such serious things as cancer.

As a rule, diseases are rare, the only symptom of which is low-grade fever. In most cases, other symptoms are present, such as pain, weakness, sweating, insomnia, dizziness, hypertension or hypotension, pulse irregularities, and abnormal gastrointestinal or respiratory symptoms. However, these symptoms are often erased, and the average person is usually unable to determine a diagnosis from them. But for an experienced doctor the picture may be clear. In addition to your symptoms, you should tell your doctor about what actions you have recently performed. For example, did you communicate with animals, what foods did you eat, did you travel to exotic countries, etc. When determining the cause, information about the patient’s previous diseases is also used, because it is quite possible that low-grade fever is a consequence of a relapse of some long-treated disease.

To establish or clarify the causes of low-grade fever, it is usually necessary to undergo several physiological tests. First of all, this is a blood test. In the analysis, you should first of all pay attention to such a parameter as the erythrocyte sedimentation rate. An increase in this parameter indicates an inflammatory process or infection. Parameters such as the number of leukocytes and hemoglobin levels are also important.

To detect HIV and hepatitis, special blood tests are required. A urine test is also necessary, which will help determine whether there are inflammatory processes in the urinary tract. At the same time, attention is also paid to the number of leukocytes in the urine, as well as the presence of protein in it. To eliminate the likelihood of helminthic infestations, a stool analysis is performed.

If the tests do not clearly determine the cause of the anomaly, then examinations of the internal organs are carried out. For this, various methods can be used - ultrasound, radiography, computed tomography and magnetic tomography.

A chest x-ray can help detect pulmonary tuberculosis, and an ECG can help detect infective endocarditis. In some cases, a biopsy may be indicated.

Establishing a diagnosis in the case of low-grade fever can often be complicated by the fact that the patient may have several potential causes of the syndrome, but it is not always easy to separate true causes from false ones.

What to do if you discover that you or your child have a persistent fever?

Which doctor should I contact with this symptom? The easiest way is to go to a general practitioner, and he, in turn, can give a referral to specialists - an endocrinologist, an infectious disease specialist, a surgeon, a neurologist, an otolaryngologist, a cardiologist, etc.

Of course, low-grade fever, unlike febrile fever, does not pose a danger to the body and therefore does not require symptomatic treatment. Treatment in such a case is always aimed at eliminating the hidden causes of the disease. Self-medication, for example, with antibiotics or antipyretics, without a clear understanding of actions and goals is unacceptable, since it may not only be ineffective and blur the clinical picture, but will also lead to the development of the real disease.

But the insignificance of a symptom does not mean that you should not pay attention to it. On the contrary, low-grade fever is a reason to undergo a thorough examination. This step cannot be postponed until later, reassuring yourself that this syndrome is not dangerous to health. It should be understood that behind such a seemingly insignificant malfunction of the body there can be serious problems.

And sometimes the body temperature remains normal throughout the day, but invariably rises in the evening.

This phenomenon does not always indicate the development of the disease, but it still indicates certain changes in the human body.

For some people, such changes generally become a normal condition, because this is how their thermoregulatory system functions. And yet you should very carefully consider the reasons for the appearance of such numbers on the thermometer.

Every evening the temperature rises to 37 degrees in adults and children for a variety of reasons. The indicators will be influenced by various factors: physiological and pathological.

Of course, if you have any complaints about your own health, you should consult a doctor. But sometimes a temperature of 37.1 (in the evening) does not mean something terrible, but is a variant of the norm.

But if such symptoms continue for a long time, you need to see a doctor. Most likely, this condition indicates an immune response to a certain threat or disadvantage.

A person rarely resorts to using a thermometer unless there are additional health complaints or signs of illness. But after taking periodic measurements, you may be surprised that there is a temperature of 37 in the evening, but not in the morning.

The thermometer readings are influenced by many factors:

• time of day (it is known that in the morning the thermometer readings are lower than in the evening, and during deep sleep the lowest values ​​are observed);
• rhythm of life (people with an active lifestyle have higher thermometer readings);
• type of measuring device (it is generally accepted that electronic thermometers have an error, unlike mercury devices);
• time of year and weather conditions (in winter the temperature naturally rises, and in summer it becomes lower);
• physiological and pathological conditions.

Physiological conditions that increase temperature

Hyperthermia does not always occur due to a specific threat. Very often it is a consequence of overload or hormonal changes in the body.

This can happen due to ingestion of hot or spicy food, nervous stress, and the prescription of certain medications.

Sometimes such numbers are not considered a pathology at all, but only a borderline state of the norm. Only in the case of a strong increase in them or an unacceptably long period of hyperthermia is a comprehensive examination of the patient’s body prescribed.

Among women

Many women periodically experience increased body temperature. This is why this happens. Hormones are constantly produced during the menstrual cycle.

On certain days, the release of some substances becomes greater and others less. Immediately after ovulation (the release of an egg from the ovary), progesterone comes into play.

This hormone is very important for maintaining the second phase of the cycle and the development of pregnancy. Thanks to it, smooth muscles relax. Progesterone also affects thermoregulation and reduces the rate of heat transfer.

Before menstruation, a woman may notice that her body temperature has increased by a fraction of a degree.

As soon as bleeding begins, progesterone levels will decrease and the thermometer readings will return to normal.

If pregnancy has occurred, elevated values ​​may persist for several months until the placenta is formed. For expectant mothers, it is considered normal if the thermometer shows 37-37.2 degrees.

A rise in temperature in the evenings is usually explained by a sharp hormonal change in the body, toxicosis during pregnancy, an increase in metabolic rate, reflex effects when drinking alcoholic beverages, or normal thermoregulation processes.

Reasons why the temperature rises to 37 in the evening:

• during premenstrual syndrome
• during pregnancy
• when feeding a baby
• during ovulation
• shortly after the birth of children
• during menopause
• after eating too much and too much food
• with excessive consumption of strong alcoholic drinks
• with significant overheating in the sun, etc.

For some women, such a temperature is generally normal, accompanying them throughout their lives.

For other ladies, the numbers often change in the evening due to increased fatigue or severe nervous tension.

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In men

Representatives of the stronger sex also often complain that in the evening the temperature rises to 37 degrees without symptoms.

This may be a consequence of hypothermia or overheating, injury, or nervous strain.

Hyperthermia can occur due to excessive consumption of spicy foods or addiction to alcoholic beverages.

The temperature may rise in the evening due to significant muscle strain after heavy physical work or intense sports training.

The most common cause could be taking a long bath or shower that is too hot, sleeping for a long time in a chair next to the radiator, or wearing a very warm dressing gown or suit.

In older people, temperature fluctuations may have their own characteristics. During the day, for example, there will be some hypothermia, and by the evening the numbers will creep up to around 37 degrees.

In addition, in men, as in women, such indicators can be quite normal and correspond to their physiological norm.

In children

A child often causes his parents great anxiety due to the temperature rising in the evening.

However, it is worth noting that in children under five years of age, due to their imperfect thermoregulation, a normal temperature can be considered 37.2 - 37.3 degrees.

Most often, an increase in temperature at night occurs shortly after an infection or other childhood illness.

The baby’s immunity is not yet fully strengthened, so his circulatory system reacts with an increased release of lymphocytes, accompanied by hyperthermia.

This is a normal reaction, indicating that the protective forces of the child’s body are guarding his health.

A rise in temperature in the evening to 37 in a child can also be explained by the most common reasons:

• Overly active games
• clothes that are too warm
• reaction to vaccination
• teething
• hot drink at night
• too warm blanket
• change of biorhythms
• a hearty dinner
• unsettled metabolism, etc.

In newborns and premature babies, a temperature of thirty-seven degrees in the evening is not uncommon and is associated with the formation of normal thermoregulation processes in the baby’s body.
Such reasons are the most common and all parents face them.

Children's nervous and vascular systems are not yet fully formed, so they react very quickly to any change in the external or internal environment.

An overly sensitive child's temperature may rise even when crying a lot or watching an interesting movie.

The baby’s digestive system can also react with an abundant release of enzymes and active intestinal activity, which is why the temperature rises to 37 in the evening.

Therefore, children’s temperature is measured only after special preparation. The thermometer should be placed at the same time under the same conditions.

Sufficient time should pass after the cessation of all activity, the child should be calm and relaxed. The baby's armpit should be allowed to dry completely, and he should not be allowed to sweat. It is advisable to measure the temperature before dinner and water procedures.

Eating

Another physiological reason for an increase in thermometer readings is food. It is recommended to measure your temperature no earlier than half an hour after eating. The fact is that when eating, the body expends heat, so it constantly compensates for it.

A noticeable increase in temperature occurs in individuals with good metabolism. Most people don't feel these changes, but if you take your temperature immediately after eating, you'll be surprised.

Since a larger meal occurs in the evening (dinner), the increase in temperature at this time of day becomes more pronounced.

Overwork

It is known that at night the thermometer readings become significantly lower. This is facilitated by decreased activity and low energy consumption. However, in the evening the indicators, on the contrary, become higher. This happens due to overwork, overexertion, and stress.

There is such a thing as chronic fatigue syndrome. In people with this diagnosis, the temperature may rise for no reason throughout the day.

Most often in the evening there is a temperature of 37-37.2 and weakness, headache. If during rest and deep sleep the indicators do not become lower, then it is worth thinking about the presence of a pathological cause of this condition.

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Reasons for rising temperature

Not always, when the thermometer registers thirty-seven, this only speaks of harmless functional reasons. Often such numbers indicate the development of a disease.

Such jumps may be the first symptom:

• Helminthiasis
• inflammatory process in the body
• introduction of infection
• development of malignant neoplasm
• cardiovascular pathology
• allergies
• neurological diseases
• rheumatism
• arthritis
• endocrine diseases
• development of mental pathologies

When an increase in body temperature is recorded in the evening, the reasons can be very different. They may be associated with intoxication by cell breakdown products, the fight against pathogenic microorganisms, or impaired neuromuscular conduction.

It is also possible to become infected with infectious diseases, so consulting a doctor in this case is mandatory.

Pathological conditions

If a person’s temperature rises to 37 in the evening, this may be an alarm bell. There are many pathological causes for this condition, but they all usually have additional symptoms. Busy people leading an active lifestyle may not even notice them.

Colds

The most common symptom of a cold is an increase in temperature. In this way, the human body tries to cope with the infectious agent. It is known that viruses die when the thermometer reaches 38 degrees. Therefore, you should not lower the temperature to 37. Allow your body to eliminate the infection on its own and build immunity.

Consequences of infection

Many infectious diseases occur with elevated temperature. But what if you are already healthy and it still continues to rise? Such an outcome is also possible. It is in the evening that the thermometer increases noticeably.

Especially often, such symptoms are due to chickenpox, acute intestinal infection, bacterial pathologies. Don't worry, your body will regain its strength in the near future. Such temperature indicators do not require the use of antipyretics. After a night's rest, they return to normal on their own.

Arterial pressure

Hypertensive patients often complain that they have an elevated body temperature. Such a natural consequence of high pressure cannot be called natural, but it is not entirely correct to consider it pathological either. As soon as the patient brings the blood pressure back to normal, the thermometer shows lower numbers.

Hypotonics, on the contrary, have. For some people it drops to 36 degrees. It is very important not to miss the moment. But if such a condition does not cause discomfort, then you can not try to fix it.

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VSD

This abbreviation stands for vegetative-vascular dystonia. Until now, this disease remains incompletely studied.

Many doctors refute it, saying that a person is dealing with chronic fatigue syndrome. One way or another, with vegetovascular dystonia, an increase in the thermometer readings occurs. A person may note that in the morning the temperature is 36, in the evening – 37.

Oncological pathologies

It is the evening increase in the values ​​of the thermometer that often makes a person turn to specialists. During the examination, tumor processes may be detected.

Benign neoplasms often do not make themselves felt like a symptom. But the reproduction of cancer cells affects the lymphatic system, so a slight increase in the mercury meter is the first wake-up call.

Immune diseases

Any deviations in the work of the immune system and the protective functions of the body affect the temperature values. They become higher with the following pathologies:

• allergy;
• rheumatic diseases;
• blood pathologies;
• system deviations.

Many diseases develop due to the increased immune work of the body, which provokes inflammation of a different nature.

What is low-grade fever, and how to deal with it?

Low-grade fever is an unreasonable increase in the temperature of the human body. In such cases, the readings do not exceed 37.5 degrees.

The temperature lasts for months or even years. This distinguishes it from the course of acute pathological diseases or physiological causes of the increase.

The main sign of subfebrile condition is that a person has an elevated body temperature. This disease accompanies:

• increased fatigue;
• drowsiness and weakness;
• decreased appetite;
• redness of the skin;
• disorders of the digestive system;
• increased sweating;
• rapid pulse;
• neuroses and insomnia.

Both a specialist and the patient himself can pre-diagnose the problem. But with low-grade fever, additional research is necessary. To do this, consult a doctor and find out why the temperature rises to 37 in the evening.

Diagnosis of low-grade fever

Before making a diagnosis, the specialist must examine the patient. The condition of the mucous membranes, the functioning of the respiratory system are studied, and the abdominal organs are palpated.

Defects in joints and lymph nodes are detected. Women undergo a gynecological examination and palpation of the mammary glands, and the menstrual cycle is studied. Anamnesis collection is carried out in several stages.

The doctor determines the following:

• whether there have been surgical interventions or injuries in the recent past (for women - childbirth and abortion);
• what infectious diseases have been suffered during life and whether there are chronic pathologies (particular attention is paid to diabetes, HIV, liver and blood diseases);
• the possibility of hepatitis and bacterial endocarditis.

Such a survey will allow the doctor to get a general idea of ​​the person’s condition. After this, he will measure his body temperature and blood pressure, perform percussion and auscultation.

Usually, already at the examination stage, the specialist notices a rash on the body, a change in the color of the skin, uncharacteristic discharge or formations.

Therefore, to confirm his hypothesis, he prescribes a series of tests showing the state of the blood picture, the possible presence of severe infectious chronic diseases or helminthic infestation.

To do this, the specialist will send the patient for laboratory tests.

To clarify the reason why his temperature is always 37 in the evening, you need to go through:

• clinical and biochemical blood test
• four mandatory tests (HIV, syphilis, hepatitis B and C)
• allergen panel
• general urine analysis
• stool analysis for worm eggs and protozoan cysts
• sputum microscopy
• discharge from the urethra and genitals
• biopsy
• spinal puncture.

The results obtained help identify helminthiasis, inflammatory processes or allergic reactions.

For the purpose of differential diagnosis, it is also necessary to do fluorography, radiography, ultrasound scanning, ECG, EEG, CT, MRI, as well as conduct special targeted studies. All this quickly makes it possible to identify tuberculosis, diseases of the heart, blood vessels, liver and kidneys, malignant neoplasms, which often cause an increase in temperature in the evening.

The specialist receives final confirmation of the diagnosis by conducting instrumental studies. For this, mammography, FGDS, angiography, ultrasonography, etc. are used.

They quite accurately allow you to identify the disease due to which there is a regular rise in temperature, as they show the condition of the patient’s internal organs. In addition, they make it possible to correlate the general picture of the disease with the altered thermal regime.