Night sweats (abnormal sweating after going to sleep, sweating stops after waking up) may be seriously caused by environmental factors, yin deficiency and blood stasis. 1. Environmental factors: If the blanket is too thick at night or the ambient temperature is too high, it may lead to mild night sweats. 2. Yin deficiency: Yin deficiency of the body will cause Yin not to astringe Yang, and Yang Qi will float over, and the deficient Yin Qi will be leaked by the transpiration of Yang Qi, and the way of leaking is night sweating. 3. Blood stasis: Blood stasis will block the body’s qi and blood, and qi and blood operation will be blocked, resulting in stagnation, so that the yin fluid will seep out, and the problem of night sweating will also occur. There are many other causes of night sweating, such as lack of yang qi and qi deficiency, etc. Patients should go to regular hospitals in time after eliminating non-environmental factors, so that professional Chinese medicine practitioners can carry out diagnosis and treatment.