Hi, I've had this smooth spot on the side of my penis. It has been there for a few months and is slightly red but often doesn't look noticeable at all. After sex however, it become much redder and tends to feel tender. I have done research and I don't believe it is herpes as it hasn't popped up anywhere else and has been around for a while. The spot doesn't itch, puss, and doesnt look like a blister. It looks like when you get a mat burn and your skin is smooth, somewhat red, and tender. Any idea what this could be and how to fix it?