Sweating around the mouth may be caused by physiological reasons, such as sweating in hot weather; it may also be caused by pathological reasons, such as rickets. 1. physiological reasons: hot weather, eating spicy food, etc., will make the body sweat gland secretion increase, sweat around the lips, this situation is a normal phenomenon, do not need special treatment. 2. Pathological causes: rickets is mainly caused by the lack of vitamin D, mostly seen in infants and young children, children with rickets may appear in the early stage of excessive sweating, crying at night, sleep disturbances, etc., and there may be sweating around the mouth, the back of the occiput and other parts of the body. Vitamin D and calcium supplements for children and nursing mothers are needed to improve the symptoms under doctor’s supervision. After eliminating the physiological causes of perioral sweating, it is recommended that patients go to the hospital in a timely manner to complete the relevant examinations to clarify the cause of the disease, and according to the condition of the symptomatic treatment.