<unk>  (also known as "Orolabial herpes":368) is an infection of the lip by herpes simplex virus.  In many cases, it causes small blisters or sores on or around the mouth that are commonly known as cold sores or fever blisters. (In medical contexts, "labia" is a general term for "lip";<unk> " does not refer to the labia of the genitals, though the etymology is the same.)  When the viral infection affects both face and mouth, the broader term "orofacial herpes" is used to describe the condition, whereas the term "herpetic stomatitis" is used to specifically describe infection of the mouth; "stomatitis" is derived from the Greek word stoma that means "mouth".  Sores associated with<unk>  typically heal within 2-3 weeks, but the virus that causes them is not removed from the body.  The herpes virus infects and becomes dormant in the facial nerves, following orofacial infection, periodically reactivating (in symptomatic people) to create sores in the same area of the mouth or face that the original infection occurred.
Herpes labialis
Linea negra
Herpes simplex
Tinea faciei
Herpes gladiatorum
Tinea manuum
Lichen aureus
Lichen simplex chronicus