What causes cold sores?

Written by Clinical Research Associates Staff


A cold sore (herpes labialis) is an infection of the mouth caused by the herpes simplex virus. What you may not realize is that even after the cold sore heals, the virus stays in your facial nerves. That’s why you often break out in the same area.

We are enrolling participants in a clinical trial. Participants will evaluate a topical cream. If you participate, you will receive study-related medical evaluations, an investigational drug, and compensation for time and travel.