Herpes is a virus that can affect organs other than the skin or the genitals. It can infect the cornea. Herpes is above all a virus, Herpes Simplex Virus, or HSV, of which there are 2 types: HSV1 and HSV2 ...
HSV1 which causes, most often in childhood, a common primary infection with significant, painful intraoral lesions. The virus can remain latent for years and give again vesicular lesions then crusty of the lips, or more extensive towards the nose, the chin, on the occasion of various events. HSV2 which is responsible for genital herpes, the lesions of which are identical to those of HSV1, often recurrent, contagious by venereal contact.