I got sideswiped by a car and crashed into a pole on my motorcycle. I suffered a sprained wrist (2 wks. ago) and a hematoma on my thigh. I have experienced that same weird quite painful ache that builds up over a few seconds and then finally fades away. Usually I get it in bed when I tense my leg or roll over. The wrist is finally starting to heal but it's worse than the fractured collarbone I once had...seems like it's taking forever to get full range of motion. As it is, I have to work very hard at squeezing the clutch. I saw Mountain bikers on TV the other night and am amazed at what they do. I figured THIS website was the place to learn about how others deal with hematomas. I got my answers. Thanks!