Well, take Lysine supplement, put ice on it if it has a blister. I have had cold sores for years and they don't go away for at least 4 or 5 days...leave it alone unless you go outside in the cold wind, then put petroleum jelly(Vaseline) on it. Don't touch it or anything unless it's really loose scab. Take lysine continually even after it's gone. i haven't had one since!