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What Are Night Sweats a Sign Of? 8 Causes and Treatment

A woman in bed sweating.
A woman in bed sweating. Many medical conditions and diseases can cause night sweats.Source: Getty Images

Night sweats facts

Night sweats, or excessive sweating during sleep, are a common symptom in women and men.

Doctors treat the problem by diagnosing the cause of your night sweats.

What are night sweats?

Doctors in primary care fields of medicine often hear their patients complain of night sweats because they are common. Night sweats refer to any excess sweating occurring during the night. However, if you keep your bedroom temperature unusually hot or you are sleeping in too many clothes, you may sweat during your sleep, which is normal. In order to distinguish night sweats that arise from medical causes from those that occur because one's surroundings are too warm, doctors generally refer to true night sweats as severe hot flashes occurring at night that can drench sleepwear and sheets, which are not related to an overheated environment.

In one study of 2267 patients visiting a primary care doctor, 41% reported experiencing night sweats during the previous month, so the perception of excessive sweating at night is common. It is important to note that flushing (a warmth and redness of the face or trunk) also may be hard to distinguish from true night sweats.

Menopause Symptoms: Emotional, Physical, and Sexual

Menopause symptoms can be perceived as physical problems, emotional
disturbances, or problems associated with sexual functioning.

Some of the variety of symptoms of menopause may include:

  • Painful intercourse
  • Hot flashes
  • Insomnia
  • Mood changes
  • Anxiety
  • Forgetfulness or problems with concentration

Read more about menopausal symptoms »

A man in bed with a fever sweating.
A man in bed with a fever sweating. Night sweats due to the menopausal transition are typically accompanied by other symptoms of menopause such as vaginal dryness, daytime hot flashes, and mood changes.Source: Getty Images

What are other signs and symptoms of night sweats?

Depending upon the underlying cause of the night sweats, other symptoms may occur in association with sweating. For example:

  • Certain infections and cancers
  • Shaking and chills can sometimes occur if you have a fever.
  • Unexplained weight loss due to lymphoma.
  • Night sweats due to the menopausal transition are typically accompanied by other symptoms of menopause such as vaginal dryness, daytime hot flashes, and mood changes.
  • Night sweats that occur as a side effect of medications can be accompanied by other medication side effects, depending upon the specific drug.
  • Conditions that result in increased sweating in general (as opposed to only night sweats) will result in increased sweating at other hours of the day.

What causes night sweats in men, women, and children?

Depending upon the underlying cause of the night sweats, other symptoms may occur in association with the sweating. For example:

  • Certain infections and cancers
  • Shaking and chills can sometimes occur if you have a fever.
  • Unexplained weight loss due to lymphoma.
  • Night sweats due to the menopausal transition are typically accompanied by other symptoms of menopause such as vaginal dryness, daytime hot flashes, and mood changes.
  • Night sweats that occur as a side effect of medications can be accompanied by other medication side effects, depending upon the specific drug.
  • Conditions that result in increased sweating in general (as opposed to only night sweats) will result in increased sweating at other hours of the day.

An older woman sweating from hot flashes holds a fan to her face.
An older woman sweating from hot flashes holds a fan to her face. This is a very common cause of night sweats in perimenopausal women.Source: iStock

Perimenopause and Menopause

The hot flashes that accompany the menopausal transition can occur at night and cause sweating. This is a very common cause of night sweats in perimenopausal women. It is important to remember that hot flashes and other symptoms of perimenopause can precede the actual menopause (the cessation of menstrual periods) by several years.

Hormone disorders

Sweating or flushing can be seen with several hormone disorders, including pheochromocytoma (a type of adrenal gland tumor that overproduces hormones known as catecholamines), carcinoid syndrome (overproduction of certain hormones by tumors of the lung or gastrointestinal system), and hyperthyroidism (excessive levels of thyroid hormones).

Idiopathic hyperhidrosis

Idiopathic hyperhidrosis is a condition in which the body chronically produces too much sweat without any identifiable medical cause.

Picture of the lungs with bacterial tuberculosis infection.
Picture of the lungs with bacterial tuberculosis infection.Source: Getty Images

Infections

Classically, tuberculosis is the infection most commonly associated with night sweats. However, bacterial infections, such as the following conditions can also be associated with night sweats:

Cancers

Night sweats are an early symptom of some cancers. The most common type of cancer associated with night sweats is lymphoma. However, people who have an undiagnosed cancer frequently have other symptoms as well, such as unexplained weight loss and fever.




QUESTION

If menopause occurs in a woman younger than ___ years, it is considered to be premature.
See Answer

A woman in a bathroom taking pills.
A woman in a bathroom taking pills. Taking certain medications can lead to night sweats.Source: iStock

Antidepressants

Taking certain medications can lead to night sweats. In cases without other physical symptoms or signs of tumor or infection, medications are often determined to be the cause of night sweats.

Antidepressant medications are a common type of medication that can lead to night sweats. All types of antidepressants including tricyclic antidepressants, selective serotonin reuptake inhibitors (SSRIs), and the newer agents, venlafaxine (Effexor) and bupropion (Wellbutrin) can cause night sweats as a side effect, with a range in incidence from 8% to 22% of persons taking antidepressant drugs. Other psychiatric drugs have also been associated with night sweats.

Other medications

Medicine taken to lower fever (antipyretics) such as aspirin and acetaminophen (Tylenol and others) can sometimes lead to sweating.

Other types of drugs can cause flushing (redness of the skin, typically over the cheeks and neck), which, as mentioned above, may be confused with night sweats. Some of the many drugs that can cause flushing include:

Many other drugs not mentioned above, including cortisone, prednisone, and prednisolone, may also be associated with flushing or night sweats.

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A woman consults with her doctor.
A woman consults with her doctor. Uncommonly, neurologic conditions may cause increased sweating and possibly lead to night sweats.Source: iStock

Neurologic conditions

Uncommonly, neurologic conditions may cause increased sweating and possibly lead to night sweats including

  • autonomic dysreflexia,
  • post-traumatic syringomyelia,
  • stroke, and
  • autonomic neuropathy.

Night sweats treatment

The treatment for night sweats depends upon the underlying cause.

In summary, night sweats are usually a harmless annoyance; however, they are sometimes a sign of an underlying medical condition. Persons with unexplained night sweats should seek medical care.

Which types of doctors treat night sweats?

Night sweats are commonly treated by internists, family practice specialists, or gynecologists. If they are related to specific medical conditions, other specialists, including endocrinologists, neurologists, infectious disease specialists, or oncologists, may be involved in the care of patients with night sweats.

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