Sweating is not a diagnosis based on one symptom. It is recommended to consult a doctor to find out the cause of the disease, which may be caused by hyperthyroidism, diabetes mellitus, hyperhidrosis, and so on. 1. Hyperthyroidism (hyperthyroidism): thyrotoxicosis caused by excessive production of thyroid hormones by the thyroid gland itself. Fear of heat and excessive sweating are the main features, as well as agitation, irritability and insomnia, palpitations, fatigue, weight loss, hyper appetite, increased stool frequency or diarrhea, and scanty menstruation in women. 2. Diabetes mellitus: diabetes mellitus patients due to the combination of autonomic dysfunction, there will often be abnormal sweating phenomenon; may also be accompanied by overeating, drinking, urination, weight loss and other typical symptoms of diabetes mellitus. 3. Hyperhidrosis: abnormal sweating of local or generalized skin in normal living environment and conditions; generalized hyperhidrosis is rare, but localized sweating is more common. Frequent sweating may also be caused by other reasons, it is recommended to consult a doctor in a timely manner, by the doctor to clarify the cause of the disease, to give targeted treatment.