Herpes simplex is a viral infection that mainly affects the mouth or genital area.Causes, incidence, and risk factors
There are two strains of herpes simplex viruses:
Herpes simplex virus type 1 (HSV-1) is usually associated with infections of the lips, mouth, and face. It is the most common herpes simplex virus and many people develop it in childhood. HSV-1 often causes sores (lesions) inside the mouth, such as cold sores (fever blisters), or infection of the eye (especially the conjunc...