This just happened recently, I'm not sure if it's because I've been trying to do this one part in BYOB, but on my fretting hand, when I move my hand to the left there is like something popping and moving upwards on the top of my hand. I was wondering how long I should stop playing for, cause I don't want to perminately damage my wrist. I don't know if this is a symptom of tendonitis or carpal tunnel.

Thanks, and sorry I couldn't do a better job at explaining what happens, it's very strange.
Hmm, yeah, I'm gonna wait a week or two without playing guitar to see if it goes away, if it doesn't I'll go see a doctor.