Genital herpes, also commonly called "herpes," is a viral infection
by the herpes simplex virus (HSV) that is transmitted through intimate
contact with the mucous-covered linings of the mouth or the vagina or
the genital skin. The virus enters the linings or skin through
microscopic tears. Once inside, the virus travels to the nerve roots
near the spinal cord and settles there permanently.
When an infected person has a herpes outbreak, the virus travels down
the nerve fibers to the site of the original infection. When it reaches
the skin, the typical redness and blisters occur. After the initial outbreak, subsequent outbreaks tend to be sporadic. They may occur weekly or even years apart.