Excessive Sweating While Sleeping

Excessive sweating while sleeping―also known as night sweats―is a common problem affecting a lot of people. The result: a heavily perspiring body despite sleeping in a room with normal temperature, a damp and moist bed. Frequent changing of sheets and clothes. Commonly referred to as sleep hyperhidrosis, this type of sleep disorder causes repeated disruption of normal sleep cycles. While it might be the result of an underlying health problem, excessive sweating during sleep can also be caused by environmental factors like sleeping in a room that's too hot.

The sleep disruption caused by the night sweats can be extremely debilitating as it not only hampers your daily life. Also leads to a host of health problems. The best way to solve the problem is to identify its cause. Once the cause is found, the appropriate treatment measures can be provided to eliminate this troubling condition. Here are some of the common reasons for excessive sweating at night.

What Causes Excessive Sweating While Sleeping?

Sweat is produced by the glands located in the skin’s dermis layer. It helps in controlling the body temperature. Although found all over the body, sweat glands are numerous around the forehead, underarms, palms. Soles of the feet. The normal causes of sweating include hot temperature, too much physical activity, eating spicy foods. Emotional stress. However, there are some health conditions that may lead to excessive and abnormal sweating, especially during the night.

Idiopathic Hyperhidrosis

When a person has excessive sweating without an underlying medical condition or disease in the body, it's known as idiopathic hyperhidrosis. This condition can occur any time, during childhood or later in life. The condition is chracterized by overactive sweat glands. The sweating is often confined to the soles of the feet, armpits, palms, groin. Under the breasts.


During perimenopause and menopause phase, the drop in the oestrogen leads to the improper functioning of the hypothalamus. This causes the skin to redden and dilate, leading to excessive sweating. The hot flashes and excessive sweating during the night for women can be triggered off in a warm bedroom. Due to sudden changes in the temperature. Hot drinks, spicy foods, dehydration, smoking. Emotional stress can trigger off these hot flashes at night. Premature ovarian failure, also known as premature menopause, can also lead to the night sweats.

Avoiding hot drinks, spicy foods, sleeping in a cool room, wearing loose fitting clothes. Drinking plenty of water can help in dealing with the hot flashes and sweating at night.


Hyperthyroidism which is an endocrine disorder that's characterized by an over-active thyroid, can accelerate the body metabolism, lead to rapid heartbeats. Sweating at night. The symptoms of hyperthyroidism also include a sudden loss of weight, increased appetite, fatigue. Difficulty in sleeping.

Antithyroid medication and radioactive iodine is known to reduce the symptoms of hyperthyroidism considerably. In severe cases thyroidectomy may be recommended.

Bronchitis Vs. Pneumonia

Bronchitis and pneumonia are respiratory ailments, as both the conditions affect the respiratory system, which includes the lungs, pleural cavity, bronchial tubes, trachea and the upper respiratory tract.

Despite sharing some common symptoms, considerable differences exist between these two conditions. Bronchitis can be controlled with the help of medications, whereas pneumonia is considered relatively serious, and is difficult to treat.

A proper understanding about the differences between these two conditions is, therefore, very important for their early detection and treatment. This can help speed up the entire process of recovery. So, let's find out some important differences between these two respiratory conditions,...


Hypoglycemia that's characterized by low blood sugar levels is common among diabetes patients who take too much insulin. Waiting too long between meals, not eating enough food. Exercising vigorously without eating snacks or taking a dose of insulin beforehand can trigger off hypoglycemia. The resultant symptoms include trembling, sweating, feeling anxious and hungry.

Nocturnal hypoglycemia which occurs at night while sleeping can lead to sweaty bed clothes, restless sleep, headaches, bad nightmares. Screaming at night.

For immediate treatment of hypoglycemia, try to consume a sugary snack or drink. In case you're unable to do so, intravenous glucose and glucagon injections might be given. In case the diabetes medication are responsible for the low blood sugar, the doctor may recommend a change of medication.


Tuberculosis (TB) is one of the most common causes of night sweats. This infectious disease which affects a person’s lungs can cause weight loss, feelings of tiredness and fever as well. Tuberculosis can be treated by taking several drugs for 6 to 12 months or longer as directed by the doctor.

Apart from TB, there are many other infections that can lead to night sweats. This includes:

  • Human immunodeficiency virus (HIV)
  • Mycobacterium avium complex
  • Infectious mononucleosis (Caused by the Epstein-Barr virus (EBV). Spread by saliva)
  • Fungal infections (histoplasmosis, coccidioidomycosis)
  • Lung abscess (Necrosis of the pulmonary tissue)
  • Endocarditis (Inflammation of the heart valves)
  • Osteomyelitis (Inflammation within the bones due to infection)


Certain medication are known also known to cause night sweats. Some of the common medication that cause excessive sweating while sleeping include:

Antidepressant Medication: Selective serotonin reuptake inhibitors (SSRIs), tricyclic antidepressants and other psychiatric drugs are associated with night sweats. These medication are used to deal with major mood problems and anxiety disorders like obsessive compulsive disorder and depression. An estimated eight to twenty two percent of people taking antidepressant medication are known to complain of night sweats as a side effect.

Antipyretics: Antipyretics also known pain relievers such as Aspirin, Acetaminophen and Ibuprofen affect the hypothalamus. They tell the hypothalamus to reduce the body temperature. In the process trigger several mechanisms in the body. Perspiration is one such mechanism which is activated in response to the intake of these medicines.

Rheumatic Disorders

Takayasu’s arteritis: An uncommon condition, Takayasu’s arteritis is a condition wherein inflammation causes damage to the large and medium-sized arteries. Apart from frequent night sweats, people suffering from this condition may suffer from swollen glands, low-grade fever, anaemia, muscle aches and dizziness.

Temporal arteritis: Also known as giant-cell arteritis or Horton disease, this condition leads to the inflammation and damage to the large and medium arteries of the head. Tiredness, depression and night sweats are some of the common symptoms of this condition.

Obstructive Sleep Apnea

When there are continual episodes of complete or partial blockage in upper airway blockage while sleeping, it's known as obstructive sleep apnea. As the chest muscles and diaphragm work to open the airway, the breathing resumes with a jerk or a loud gasp. Apart from sleep disturbances, snoring, daytime fatigue. Restlessness during sleep, obstructive sleep apnea can also lead to night sweats.

Mechanical therapy in the form of continuous positive airway pressure (CPAP) is a prefered initial treatment for this condition. Sometimes oral mandibular advancement devices. Certain dental appliances can be used to prevent the throat from blocking the airways. To advance the lower jaw forwards. In severe sleep apnea that's caused by head-face abnormalities, surgery may be required.


Excessive sweating might also indicate certain cancers, like lymphoma (the cancer of the lymphocytes) and leukaemia (cancer of blood and bone marrow). If the phase of excessive sweating is accompanied by unexplained weight loss and fever, it's best to consult a physician to rule out the possibility of cancer.

Anxiety and Stress

Anxiety and worrisome thoughts at night can lead to excessive sweating. The anxiety activates the fight or flight system in the body. This in turn causes the blood to rush to the body parts that need it. This leads to a constriction of the blood vessels, also known as vasoconstriction. The body heats up as a result. A person can start sweating.

Neurological Problems

Although they're fairly uncommon. Certain neurological conditions can also lead to night sweats. These include:

Autonomic Dysreflexia: Also known as hyperreflexia, autonomic dysreflexia, is caused by spinal cord injury at a Thoracic-5 level and above. Nerve impulses to the spinal cord are blocked by the lesion. This leads to an increase in the activity of the sympathetic portion of autonomic nervous system. The symptoms of this condition include spasms, high blood pressure. Profuse sweating.

Post-Traumatic Syringomyelia: A life-threatening complication following a traumatic spinal cord injury, post-traumatic syringomyelia is associated with the development and progression of a cyst filled with cerebrospinal fluid within the spinal cord. This leads to chronic pain, loss of function, respiratory failure. Death.

Stroke: Strokes are characterized by a loss of brain function due to a disturbance of the blood supply to the brain. it's often caused by severe spinal cord injuries. Results in profuse sweating, nasal stuffiness. Throbbing headaches.

Other Medical Conditions

Other diseases that result in night sweats include:

  • Chronic fatigue syndrome
  • Diabetes insipidus
  • Gastroesophageal reflux disease
  • Granulomatous disease
  • Chronic eosinophilic pneumonia
  • Lymphoid hyperplasia
  • Prinzmetal’s angina

Sleeping Environment

One of the most common reasons for night sweats is a toasty sleeping environment! There are several ways to stop excessive sweating caused by this. Simple things like removing a blanket. Using the fan or AC, etc. can help in dealing with the night sweats.

To treat this disorder effectively one has to find out the actual cause behind the excessive sweating. it's only after proper diagnosis that the root cause can be found and effective treatment introduced. Cutting back on stress. Taking up certain stress-relieving practices, like light exercise or meditation have been cited to relieve night sweats. Most doctors advice antiperspirants, botox injections. The iontophoresis therapy as the cure. However, in certain severe cases surgery is also advised.


Leave a Reply

Your email address will not be published. Required fields are marked *