Mine was caused mostly by grinding in a weld shop but Im sure playing guitar contributed too. I was in constant pain by the time I had the opperation. I couldnt play! I couldnt work and it took 6 months to get back close to normal again. Now, 10 years post opp. I still play guitar but for not as long at a time. I play with light strings and close action and I stay well away from weld shop grinders. :) Don't work too hard at this stuff. Besides normal finger tip callouses, if it hurts, stop!