Sweating at 4 or 5 in the morning is considered by Chinese medicine practitioners to be caused by a deficiency of lung qi and a lack of solidity of the surface of the guard, the treatment of which is mainly based on the benefit of qi and solidity of the surface. Sweating at 4:00 or 5:00 in the morning may be caused by lung qi deficiency. According to the Chinese medicine point of view, 4, 5 o’clock in the morning belongs to the c time, is the lung meridian meridian qi exuberant hour, the lung main qi, and qi has the role of fixed, so when the lung qi is weak, the lung guards are not solid, the pore skin of the fixed role of the weakening of the situation, there will be abnormal excretion of sweat. Sweating at 4 or 5 o’clock in the morning may also have other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, give targeted treatment or standardized treatment.