Genital herpes is a common sexually transmitted infection caused by the herpes simplex virus that can cause painful fluid-filled blisters on the genitals and rectal area. While treatment with antiviral medication can reduce symptoms, the virus remains dormant in the body and outbreaks can reoccur. It is important for people with genital herpes and their partners to use condoms during sex to prevent transmission and take precautions even after outbreaks subside since the virus can still be spread without visible symptoms.