Definitions for "Fever Blister"
Keywords:  herpes, simplex, blister, sore, cold
See Cold Sore.
caused by herpes simplex virus type 1 (HSV-1)
a sore from an infection caused by the herpes simplex virus, characterized by an eruption of small and usually painful blisters on the skin of the lips, mouth, gums, or the skin around the mouth