How can you reduce redness from an old cold sore?

Redness from sore: Redness will usually naturally fade over time as the body does natural healing. If it were me, i'd consider putting a little cosmetic cover on it until it fades on its own. However, some people will try over the counter Mederma for scars to see if it will help. The q-switched pulsed dye laser can take the redness away faster but has the side effect of a temporary bruise and is expensive for that.

Diagnosis first: Hi, it’s hard to say without a picture but there is a great app that may be able to help you get a diagnosis without being seen in person by a dermatologist. The app is called VisualDX and is one of the best, if not the best out there. Many clinicians, including myself, use it. Just snap a photo and it gives you a list of possible diagnoses. Good luck!