Genital herpes virus refers to the herpes simplex virus, which is divided into Type 1 and Type 2. Type 1 virus mainly causes infections of the skin and mucous membranes outside the genital and anal regions, but infections can also be caused by Type 2 virus. Type 2 virus primarily causes infections of the skin and mucous membranes of the genitals and anal area, although a minority of cases can also be caused by Type 1 virus. When herpes simplex virus Type 1 or Type 2 infects the mouth, it can lead to herpetic gingivostomatitis and herpetic pharyngitis.