i think i pulled something... i pop my knuckles all the time. and i pop my thumbs too, by bending them inward with my other fingers on top.. much like making a fist with your thumb inside. i hurt my left thumb popping it one day, but for a few months now my thumb has been killing me when i bend it certain ways... like... really hurting. there is no swelling or anything like that... it just hurts.. i figured it would have gone away by now... but i'm not sure what i did to it. is it possible to have pulled something that would make it hurt this long???
Der! Probably! Popping your knuckles doesn't technically cause any damage to the joint but could over-stretch the muscles and ligaments. So stop doing it! If you sat next to me at work I probably would have caused you even more damage by now! Oh dear - don't mean to be mean... it's just that it goes right through me when someone does that - like fingernails down a blackboard. Take some ibuprofen or asprin to reduce the swelling you've probably caused, and put some ice on it.