Hello.
I had unprotected sex approx a month ago with someone. I now have a small red bump maybe 2mm in width on the foreskin of my penis, it's been there for a few days now it's over top of a vein don't know if that matters.
It's not very prominent but protrudes ever so slightly off the skin. There is only the one bump. There is no pain or anything but it's there. Is there any idea as to what it could be from?