First if all, let me start by telling you that I have two very pronounced dimples in my lower back. Anyway, about a month ago I noticed a quater sized bruise a little to the right side of my right dimple, it wasn't really painfull or anything that I noticed, it eventually went away, but over the past few weeks I have noticed a knot under the surface that has shown up in the same area, it only hurts a little if I hit it or lay on it, what could this be and any suggestions on ways to treat it or get it to go away? Oh, and I am a dancer, and I do roll on a hard surface over this area quite a bit, not sure if that makes any difference or not. However, the more I roll on it or anything, It swells quite a bit and gets really hot to the touch.