A few days ago while using the restroom I noticed a large, painful bump on the base of my penis on the right side, meeting with the scrotum. It is about the size of a penny and was not there a week ago. It s extremely painful, and I ve tried popping it a few times. Nothing comes out, even when using a needle to try and open it. Now, it is hurting even if I ve not messed with it and I m worried it could lead to more problems. What should I do?