Herpes simplex virus is a virus that can infect humans and can be divided into type 1 and type 2, with type 2 mostly causing herpes near the genitals. Only elevated IgG antibodies and the absence of associated clinical symptoms indicate a previous infection with the virus, but not a current infection. Herpes simplex virus infection may recur repeatedly after the human body is infected, and those who do not have any clinical symptoms can be left alone; those who have genital herpes symptoms and have elevated IgM antibodies to herpes simplex virus indicate the presence of this virus infection, and should also apply relevant antiviral drugs or apply other drugs to regulate their immunity.