We call night sweating night sweating, our normal sweating mainly by the environment, temperature, humidity, and sympathetic nerve regulation. The temperature and humidity are high sweating, sympathetic nerve excitement sweating is easy to more. If you sweat a lot when you sleep, it may have something to do with the environment, temperature, humidity, or with covering more, which is a normal physiological phenomenon. If you exclude this normal situation, it may be caused by some other physical and mental diseases, such as anxiety, depression and other psychological factors, or infectious diseases such as hepatitis B and tuberculosis, or endocrine-related diseases such as menopause and hyperthyroidism. In short, if you sweat a lot at night, if you exclude physiological and environmental factors, you need to find some causes.