Excessive underarm sweating, which belongs to local hyperhidrosis, can be roughly divided into three categories from the causes: First, due to systemic diseases, such as endocrine disorders, hyperthyroidism, diabetes mellitus, hyperpituitary gland function, etc. Neurological diseases, some infectious diseases, etc., long-term illnesses cause physical weakness, as long as the systemic diseases are controlled later, the symptoms of excessive sweating can be relieved. Second, psychogenic sweating, caused by high tension and emotional overexcitement, is due to sympathetic dysregulation, internal sedative drugs such as atropine, with temporary effects, but with side effects such as dry mouth. Third, gustatory sweating belongs to another physiological phenomenon, sweating caused by eating certain stimulating foods, such as chili, garlic, ginger, coffee, which is generally very common.