I've had it xrayed (it's nice to have friends in the business ) and that's normal. The pain is right at the top of the iliac crest. It's weird. I'm not sure if it's the hip flexor, one of the deep gluteus mucles or the abdominal muscle. I can bike, but I can't run. I can hike UPhill, but downhill hurts. I have no idea how I hurt it. I think I'm going to contact a PT that I know and have him take a look.