Why Do I Sweat in My Sleep

night sweating

We heard that some people always sweat when they sleep at night, and sometimes they sleep until midnight and find that their body sweats so much that even their clothes are soaked.

Sweating is a normal manifestation of human metabolism and a barometer of human health. But some abnormal sweating phenomena are the body's warning to us, such as frequent sweating while sleeping. Studies have found that 10%-40% of adults have had the experience of sweating while sleeping at night. If it happens occasionally because of bedroom temperature, nightmares or your physical state, it is normal. However, if it recurs frequently, you may be suffering from sleep hyperhidrosis, and it is necessary to pay attention at this time. And this article is here to tell you why you sweat while sleeping at night and how to fix it. Let’s get started.

Part 1. Why do I sweat in the sleep

1. Hot weather

In the summer, many people tend to sweat when they sleep at night. If you also cover the quilt with a poor breathability, the probability of sweating will be higher. When the ambient temperature is too high, the human body temperature regulation system will maintain a constant temperature, and it is necessary to sweat to help the body cool down and maintain the balance of body temperature.

2. Weakness

The night sweat symptoms are related to physical weakness. Some weakness people often sweat abnormally after falling asleep at night. Even in cold winters, they have night sweat symptoms as well.

3. Other diseases

People with other diseases such as high blood pressure, diabetes, hyperthyroidism, endocarditis, lymphoma, and people with mental disorders also experience sweating at night because the disease stimulates the nervous system and makes certain nerve disorders, and cause sweating at night.

In addition, some sleep disorders can also cause night sweats, such as obstructive sleep apnea, which can cause throat muscles to relax and interfere with the airway. The patient's breathing stopped and started repeatedly while they were asleep, and in order to maintain normal breathing, people were forced to inhale and gasp, resulting in flushing and sweating.

Part 2. How to treat night sweating.

Now that we understand the causes of sweating at night, we can know how to deal with them.

1. Lower ambient temperature

Wear less clothing while you sleep, use a more breathable quilt, or use an air conditioner to adjust the surrounding temperature to help cool down and relieve night sweating.

2. Exercise

Doing more exercise can relieve the night sweating caused by physical weakness, and you should take some time for physical exercise in your daily life. Through effective exercise to improve the body's immunity, promote the body's metabolism and circulation, it can effectively prevent the appearance of night sweat symptoms.

3. Go to hospital

You need to go to the hospital to check if you have the diseases we mentioned above that leads to night sweating, and then have a professional treatment.

4. Diet and hygiene

If you sweat when sleeping at night, you need to eat less spicy, greasy and fried food, especially for dinner. At the same time, sleep hygiene should also be maintained. Pajamas, sheets, quilts and other items should be changed, washed or dried frequently to keep them clean and dry. Also pay attention to personal hygiene and take a bath frequently to reduce the irritation of sweat to the skin.

Recommend reading: How to Stop Sleep Talking at Night?


It can be seen that sweating at night is mainly related to the ambient temperature and physical condition. If you want to avoid frequent sweating when you go to bed at night, you need to start from many aspects such as diets, exercises and develop healthy habits. Of course, if sleep sweating is caused by physical diseases, you must go to the hospital to check your body in time.