Do I have a disease or STI or something? I have a reddish bump on my penis. It is kind of sore. I have had my penis sucked a couple of months ago. I have been masterbating a lot lately. But I haven't been sexually active in a while. I am still a Virgin. This is the first time a bump has appeared there.

It is impossible to diagnose in cyberland. Make an appointment with a doctor if you are worried about it.