In reply to woody0606: are oyu using a straight bar? are you doing narrow grip witrh your pamls turmed towards you or are you doing wide grip with palms away from you?
i find straight bars begin to make my wrists a bit sore.. especially when i do narrow grip pull ups ones.
to avpid this i mainly go wide grip as i think they work the biceps as well as your back a bit better than narrow grip and i usually use bent pull up bars that are lower where my hands are in comparison to the height of where i'm aimimg to get with my chin.. if that makes sense? most gyms have weight stacks with cable set ups with a bar across the top with various pull/chin up grip positions.
maybe also try taping your wrist to maybe help align tendons ... no expert but i tape my wrists when i climb and it's help tweaking/twindging alot.