A few weeks ago, I cased a landing, hard. On a new frame, didn't expect it to pop up quite so much on a jump and missed the landing by a few feet. Beat the crap out of my left shin, there's quite a noticable dent in it. I rode the rest of the way out, and I've been riding plenty since without issue, but any time I go running my whole leg below the injury goes numb.
Any guesses? Having self-diagnosed that it's not a break, I figure any doctor would just tell me to stay off it for a few weeks while it heals from whatever, so I haven't worried about it.