Recurrent herpes labialis (cold sores) is a common infection of the lip. The usual cause is the herpes simplex virus type 1 (HSV-1) although HSV-2 is been increasingly implicated. It is estimated that 90% of the population have been exposed to HSV-1. 20-30% of those infected experience outbreaks of small blisters or sores on or [read the full story…]