I have a what looks like a bruise on my penis. I don't know if it is or isn't though. What worries me is that it has a pain usually after I masturbate for sure, but I'm not totally sure about using the bathroom. It's like a sharp pain like a needle. I can feel it well, but it's not a horrible pain that I can't deal with. It looks like a bruise, but could it be something else that I should worry about? I know I need to stop masturbating and I will. Is their anything I should do?