For the last few days I've had a tender area of skin at the top of my bits, just on the right hand side. I woke up this morning and it feels like I've been kicked there, like it's bruised. There's nothing at all visible from the outside (that I can see) but even just walking hurts. It's not muscular or to do with the bone, it's very much the skin. Anyone any ideas what it could be...?