Sweat herpes may be caused by genetic factors, environmental factors, and infectious factors. 1. Genetic factors: herpes sweat usually has a certain genetic predisposition, one parent has herpes sweat, the probability of children suffering from herpes sweat may be much higher than others. 2. Environmental factors: Herpes sweat is easily triggered by higher surrounding temperatures, increased sweating, or prolonged exposure to sunlight. 3. Infectious factors: herpes sweat may also be related to infectious factors, such as fungal infections, the main causative organism is red trichophyton, when the skin is invaded, it can cause herpes sweat. In addition, herpes perspiration may also be related to allergies, mental and psychological factors, after the symptoms of herpes perspiration, we should seek medical treatment as soon as possible.