Herpes simplex virus, abbreviated as HSV, is categorized into HSV-1 and HSV-2. HSV-1 is mainly infected through close contact and HSV-2 is mainly infected through sexual contact. The herpes simplex virus enters the body mainly through direct contact and sexual contact transmission. When the body experiences a decrease in immunity, the latent herpes simplex virus in the body is activated and the disease develops. HSV-1 is mainly transmitted through direct contact, mostly infecting areas above the waist and easily causing herpes on the lips and mouth. HSV-2 is mainly transmitted through sexual intercourse, mostly infecting areas below the waist and causing genital herpes. It is recommended to do a good job of daily protection to avoid contact with the infected person caused by infection, if accidentally infected, need to seek medical treatment in a timely manner.