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Causes of Night and Day Sweats

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Night and day sweats are characterized by ecxessive, profuse sweating (hyperhidrosis) not caused by activity or exercise. Profuse night sweats can cause daytime fatigue because of the need to wake up several times a night to change soaked bedding. Daytime sweats may cause a person to isolate themselves because of becoming soaked multiple times during the day, causing embarrassment.

Excessive night and day sweats are usually the cause of an underlying condition, some of the most common conditions that cause night and day sweats are:


Some medications have the side effect of profuse, or excessive sweating. The most common medications that cause excessive sweating are antidepressants, blood pressure medication, aspirin and poracetamol (acetaminophen). Antidepressants are said to cause excessive sweating in about 22 percent of people taking them.


The changes of hormones during menopause are one of the most common causes of excessive night sweats and daytime hot flashes in women. Men may also go through the same hormonal changes as women do and develop night sweats.


Anxiety, especially an anxiety attack, can cause day and night sweats. Anxiety causes an increase in heart rate, pulse, respiration and adrenalin. An increase in these vital signs and hormone levels may cause sweats.


Hypoglycemia is a syndrome that cause low sugar levels in the blood. The most common symptoms of hypoglycemia can be mild to severe and are excessive sweating, lethargy, pale skin and shakiness. Hypoglycemia occurs when a person who has diabetes doesn't get enough food or exercises to much.


Infections such as turberculosis and AIDS can cause day and night sweats. Most infections can cause a low grade or even a high fever which increases the heat of the body and causes excessive sweating.


People who have an immune suppressed disease (rheumatoid arthritis, lupus, etc.) may have an infection in their body which their immune system tries to fight off but is not strong enough to. They are prescibed immunosuppressive medications to treat the infection. These medication are generally used on people with AIDS and some types of cancer (lymphoma). The immunosuppressed can develop excessive day and night sweats.


One of the most common symptoms of advanced hyperthyroidism is excessive sweating. Treatment for excessive sweating caused by hyperthyroidism is aimed at treating the disease.

Foods and fluids:

Hot, spicy foods and drinks can cause night time sweating if drank right before bedtime. They can also cause day time sweats if eaten or drank during the day, especially if it is a hot day. This may cause only temporary sweats.


Studies show that among the elderly population, excessive nights sweats are quite common. Common causes include fever, anxiety, pain, sensory deficits and restless leg syndrome. Sweats are most commonly related to emotional or physical stress when found in the elderly population.

Night and day sweats are most common among adults age 41-55 years old. Women are found to rarely report excessive sweating to their physician, while men are more likely to report night and day sweating. Women also report having hot flashes and panic attacks, along with the excessive sweats, while men complain of sleep disturbances as co-symptoms.

If you are suffering from bothersome excessive day and night sweats see you doctor for an appointment. Your doctor can do tests to see what is causing you to sweat so much and therefore find an effective treatment. Among the treatments for day and night sweats are medications, gland blocking therapy and surgery to cut off the sweat glands.

More about this author: Chelsea Padget

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