The cause(s) of my OI have never been pinpointed. Today, I bumped my shin against a doorframe and was reminded of an injury I received at about age 14 or 15. It was in winter, and I slipped and fell and smashed by left shin against a large tree root. Ever since then, an area of my left shin just below the knee has been slightly indented to the touch; and sensation in that leg below the affected area has been diminished slightly. When I touch the area, I sometimes get a tingling-burning feeling. There's obviously some nerve damage there. But today, I was rubbing the injured area (after hitting it on a doorframe), and when I pulled out on the skin, my heartrate dropped after a few seconds; and it sped back up after I let go. I was shocked. The effect is repeatable. Does this make any sense to anyone? Could the probable nerve damage in my leg be related to my OI?