I have a pinkish redish mark on my penis just under the ridge of the head , on topside of penis , right in the center, it almost looks like thinnner skin like it was an abrasion but it was not, i noticed a week or so ago, it is paineless and there is slight barely noticible sweeling in my penis head right above it , again no pain....i am std free and havebt had sex in over Six months, and the previous partner is completely clean