In reply to Terry Walker:
I ve had two in last year alone. First time a loud crack (like when a twig snaps) in a2 middle finger. Had to take 4 weeks off as even jugs were causing pain (as they normally press on that area). Started slowly after that with at least 2-3 days between sessions, gradually increasing grade, trying harder but when it started to hurt went back to easier grade for couple of routes. Kept icing in the evenings and exercising the finger (stretches) whenever I had nothing to do with my hands, massaging etc. always taping for climbing...took about another month till it was almost ok and was climbing probably even better after another month. Second time similar loud pop (was about 3 meters above the ground and belayer thought it was my elbow clicking!) - this time a4 on ring finger same hand. Did similar stuff as before but only taking 2 weeks off and it was quickly back to normal. I think it quite depends which finger is involved - if it had been my little one I wouldnt probably even notice as I dont use it at all. Both injuries changed my attitude to crimping though - I definitely dont crimp anymore even though both times it happened on crimpy sidepulls/pinches