The cause of herpes perspiration is not yet completely clear, it may be related to mental factors, ultraviolet radiation and other physiological causes, but also may be related to local allergies, skin infections and other pathological causes. 1. Physiological causes: emotional tension, excessive pressure, skin exposure to ultraviolet radiation, hot and humid climate and other factors may cause herpes perspiration. 2. Pathologic causes: (1) local allergy: contact with heavy metals such as nickel and cobalt may cause skin allergy and symptoms of herpes perspiration, in addition, it may also be related to allergic diseases such as allergic rhinitis. (2) Skin infections: When the skin is infected by dermatophytes it may lead to the development of herpes perspiration. In addition, people with atopic dermatitis are also prone to herpes of sweat. When the appearance of herpes sweat can not be relieved, it is recommended to go to the hospital, under the guidance of the doctor for treatment, do not blindly use their own medicine.