Herpes Simplex Virus (HSV), Sacral

Herpes simplex infection of the lower back and buttocks—also called sacral herpes simplex or genital herpes—is a common, recurrent skin condition associated with infection by the herpes simplex virus (HSV). HSV infection usually appears as small blisters or sores around the mouth, nose, genitals, buttocks, and lower back, though infections can develop almost anywhere on the skin.