Not to hijack thread, but I've got a similar problem, caused by a similar situation. Basically, I got pissed and punched throw a wall, punched a brick wall a few times, and punched a few trees.

Now the knuckles on my right hand ache constantly. It doesn't get much worse when I box. It also feels "tight" around my knuckles (I know it doesnt make much sense, but thats the best I can describe it). Is it the same problem, or might it be the actual knuckle?