There is a small gray bump on the edge of my anus at the back(like from the lower back straight down at the very edge of the anus where your skin becomes soft, there it is) and it is sensitive to touch. I am 18, am not and have never been sexually active, I'm fit and have always been healthy, so this surprised me. I'm a private person and so won't go to a doctor or tell my parents, unless I must, this is embarrassing. I'm hoping my body will get rid of it? The bump is painful. This may be stupid, but what if it's some kind of..bug? It looks kind of shiny, like there's something filling out the skin. The bump is about the width of a pencil eraser.It feels solid when pressed. I only noticed it yesterday. Please let me know as soon as possible. I don't know what other information to give. So, painful small gray bump at the edge of the anal cavity, newly developed, not soft... I hope you can help.