1, unclean sexual life. Impure sexual intercourse is the main cause of genital herpes infection. Genital herpes is almost always caused by sexual contact. Patients with genital herpes are the main source of infection, spreading quickly and with a high rate of infection, which usually develops about 3 weeks after infection. 2. Traumatic infection. The herpes virus of genital herpes can invade the body through a small ruptured wound on the skin or mucous membrane, and after a few days of incubation, the germs multiply to a sufficient number to start the disease. Therefore, it is important to treat the ruptured wound with care. 3. Low autoimmunity. This is mainly a non-sexual contact infection, contact with the secretions of genital herpes patients or contaminated utensils, such as towels, footcloths, footbaths, clothes and blankets, and even the toilet seat of the toilet, can be infected. 4, genital herpes inoculation infection. In the process of treatment may contain genital.