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What is the cause of sweating during sleep?

  Cause of sweating while sleeping

What is the cause of sweating during sleep?

Many reasons may cause night sweats, night sweats, or excessive sweating during sleep. It is not considered a matter of concern and does not usually indicate the presence of any health disorder, even if this sweating awakens the person from his sleep and causes him to feel disturbed, [1] and the most important of these reasons can be stated as follows.


Menopause is defined as the age at which a woman reaches a period where she has not had her period for at least twelve consecutive months, meaning that the menstrual cycle has been absent for a continuous whole year, and the average menopause for women is fifty-one Age, and the fact that menopause is preceded by a transitional stage known as the premenopausal stage, which occurs during the age period ranging between forty and fifty years of age of the woman, and the fact that the occurrence of sweating during sleep is one of the natural physiological matters that occur upon reaching menopause as well as in the stage in which menopause occurs. Before puberty, the reason for this is a low level of estrogen its levels change during these periods, as the ovaries in the premenopausal stage decrease their production of a group of hormones, namely estrogen, testosterone, and progesterone, as well as disorder and irregularity in the menstrual cycle, and it is the estrogen changes that are directly linked to night sweats, as mentioned above; [3] According to the results of a study published in 2015 in the journal (BMC Women's Health), the most common symptoms of menopause are hot flashes and night sweats; About 40% of women who have reached menopause suffer from hot flashes, and about 17% suffer from night sweats.


In fact, pregnant women suffer from excessive sweating, especially in the first and third or last thirds of pregnancy, in addition to increased sweating in the postpartum stage as well. It is very normal, and the reason for the pregnant woman feeling excessive heat and sweating more than needed can be explained by the following:

  • hormonal changes that happen during pregnancy; These progressions assume a significant part in clarifying the manifestations that show up on pregnant ladies, including night sweats, as these chemicals cause an expansion in the internal heat body level and accordingly, increment perspiring.
  • The increase in the amount of blood that circulates in the blood vessels during pregnancy, and the increase in blood volume makes the pregnant woman feel warmer than usual.
  • The weight gain that happens during pregnancy assumes a significant part in expanding the pace of perspiring during rest.
  • expanded metabolic rates; It implies the pace of consuming fat , calories and building rates, as the speed of these cycles increments during pregnancy, in light of the fact that the pregnant lady's body at this stage works for two; The mother and her hatchling.
  • Expanded perspiring during pregnancy because of doing a few exercises, like working out, cleaning the house, strolling, or partaking in certain exercises that pressure the body.
idiopathic hyperhidrosis

Idiopathic hyperhidrosis is a condition in which excessive sweating of the body occurs at any time, especially when the patient is exposed to anxiety, and the sweating is accompanied by a somewhat unpleasant odour, provided that this occurs without a specific health cause, so the case was known Excessive sweating of unknown aetiology.

Infection and inflammation

Infection and inflammation can cause a high temperature that is accompanied by sweating, although a bacterial infection is considered more cause of night sweats compared to viral infections, some viral infections may also cause night sweats, including human immunodeficiency virus (HIV) infection, in short, HIV, which causes AIDS, and as for bacterial infections, some of them cause excessive sweating About the high temperature that is not related to the night, meaning that the person with this infection may suffer from sweating at any time of the day, including the day or night, and that includes influenza infection, and it is worth clarifying that there are some types of bacterial infections that are known to cause more than others. Night sweats, including tuberculosis infection, and infective endocarditis, which is an inflammation of the heart valves, as well as bone inflammation osteomyelitis, abscess, and brucellosis, these bacterial infections all may cause night sweats.

low blood sugar

Hypoglycemia is the condition in which the sugar level falls below the limit that the body needs to perform its functions in the required manner. This condition is usually defined when the blood sugar reading drops below 70 mg/dL. Health is common among diabetics, particularly people who take insulin, even among those who regulate their condition well, albeit infrequently. As for the relationship of low blood sugar with night sweats; The fact that this decrease occurs at night causes night sweats, which are usually accompanied by headaches, disturbed sleep and the occurrence of nightmares.

taking certain medications

Some types of medications can cause night sweats, including some types of antidepressant medications. According to the results of the study conducted in 2013 and published in the Journal of Innovations in Clinical Neuroscience; The percentage of people who take antidepressants and suffer from excessive sweating ranges between 4-22%, and medications for some other mental illnesses can cause the problem of night sweats, as well as drugs used to reduce temperatures such as paracetamol and aspirin, [10] [11] and Other medications that may cause night sweats to include the following:

  • Diabetes medications, such as insulin and glipizide.
  • Steroids.
  • Atorvastatin.
  • Naproxen.
  • Buspirone.
  • Bupropion.

People with cancer suffer from the problem of night sweats, and this may be a symptom of the disease itself, or as a result of other reasons that we will discuss below, but in general, it can be said that people with cancer complain of hot flashes and night sweats, especially women, and the reasons that lead to this are the following:

  • Infection and inflammation this is perhaps the most common cause of night sweats in cancer patients, and treatment of infection necessarily discourages the problem of sweating if it is the only cause.
  • Infection and inflammation this is perhaps the most common cause of night sweats in cancer patients, and treatment of infection necessarily discourages the problem of sweating if it is the only cause.
  • Changes in the level of hormones in the body, which may occur as a result of cancer itself, or treatments used to control it, such as chemotherapy, radiation, surgery, or hormone therapy.
  • Some types of cancer, such as:

  1. Non-Hodgkin lymphoma.
  2. Hodgkin's lymphoma.
  3. Leukaemia or leukaemia.
  4. Mesothelioma.
  5. Bone cancer.
  6. Liver cancer.

hormonal disorders

Sweating or hot flashes can result from a disorder or imbalance in some hormones in the body, and hormonal disorders that cause sweating during sleep include the following:

  • Pheochromocytoma: It is a rare adrenal tumour, and it causes an increase in the adrenal gland's secretion of its hormones, especially the hormone epinephrine is also known as adrenaline and the hormone norepinephrine or norepinephrine for these glands. Hormones cause a wide range of symptoms and such conditions occur in the form of flashes or fits.
  • Carcinoid syndrome : This syndrome occurs when a cancerous tumour arises that secretes chemicals into the bloodstream, which causes the emergence of a group of symptoms, and the fact that this tumour usually affects the digestive tract and lungs, and it is worth noting that it is rare.
  • Hyperthyroidism: This condition is characterized by an increase in the thyroid gland's secretion of its own hormones.

other reasons

In addition to the above, the occurrence of sweating during sleep can be attributed to other causes, which are explained below:

  • Obesity or being overweight.
  • Cardiovascular problems.
  • Parkinson's disease.
  • suffering from gastroesophageal reflux disease; Although heartburn is considered the main symptom of this disease, night sweats are among the symptoms that may accompany this condition as well.
  • suffering from gastroesophageal reflux disease; Although heartburn is considered the main symptom of this disease, night sweats are among the symptoms that may accompany this condition as well.
  • Obstructive sleep apnea: This condition occurs as a result of narrowing of the walls of the throat, which causes obstruction in the process of breathing. It is worth noting that sweating during sleep is more common among people with obstructive sleep apnea compared to others without this disease.
  • Anxiety problems and disorders.
  • Autoimmune disorders.
  • Myelofibrosis is a disorder of the bone marrow.
  • A pyogenic abscess is a cavity filled with pus as a result of an infection.
  • Some neurological disorders and problems, but it is worth knowing that these conditions cause night sweats not common, and among these cases are the following:
  • Stroke.
  • Autonomic dysreflexia.
  • Syringomyelia caused by injury.
  • Autonomic neuropathy.

Reasons to see a doctor

Many things require a doctor’s review if accompanied by night sweats, they can be mentioned as follows:

  • Significantly high temperatures.
  • coughing;
  • diarrhoea.
  • Unexplained weight loss.


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