What causes genital herpes?
Genital herpes is caused by an infection with the herpes simplex virus (HSV). There are two different forms of the virus that can cause herpes - HSV1 and HSV2. HSV1 is more usually associated with cold sores near the mouth (oral herpes), while HSV2 is more commonly associated with the genital herpes. However, it is possible to be infected with either strain at both sites.