Hello. Here is my question. A few months ago I noticed a pimple like bump on the skin on the shaft of my penis. I believed it was an infected hair because I do shave down there. Over time the bump has gotten a little bigger (barely) and has turned black. It doesn't hurt at all nor does it itch. I did some research on here and judging by the symptoms of penis cancer, that isn't it. It is not attached under the skin. Any ideas on what it could be. Almost looks like a small blood blister that is raised a little bit. I have not been sexually active for a little over a year, so I don't think it is an STD. thanks for any ideas...