Cold Sores and Fever Blisters
Cold sores and fever blisters are caused by an infection of the Herpes simplex virus, which can affect any area of the skin and genitals. After an initial infection, the virus goes dormant beneath the skin. It reappears periodically in the same area with a cluster of tiny blisters which break, leaving a sore that heals in about one week. New medications greatly speed healing or, if taken regularly, can prevent a reoccurrence.