Herpes tests are done to find the herpes simplex
virus (HSV). An HSV infection can cause small, painful sores that look like
blisters on the skin or the tissue lining (mucous membranes) of the throat, nose, mouth,
urethra, rectum, and
vagina. A herpes infection may cause only a single
outbreak of sores, but in many cases the person will have more
There are two types of HSV.