I fell after losing my balance going up some stairs. My shin took the hit in the fall just a few inches above my ankle. This happened 17 days ago, the bruising, and cut have healed. However, I still have a knot under the skin, and its still painful, along with the area surrounding the injury. I am concerned because it still hurts so much to the touch, and the size of the knot. Please help, and thank you.