I was performing Sunday morning at Sofia's Bistro as I do every Sunday and everything was fine. I did have a paper cut on my thumb from a book's dust jacket but I practiced the night before and there were no problems. I played the first hour long set of my original instrumental guitar music and I noticed during my break that my thumb skin was starting to peel on the paper cut. It didn't hurt so I wasn't concerned as I went to play the second set.
I played with no problems until half way throught the second set I noticed my thumb felt like it was sticking to the strings. I looked down at my guitar and it had speckles of blood on the front. Then I looked at my thumb. Yuck. I won't go into details but it wasn't pretty. Needless to say I called it a day. It didn't hurt until I was home which may have been shock or just mentally blocking out the pain.
I couldn't play a gig for 2 weeks but I am fine now. It's the first time I never finished a gig. I hope something like that never happens again.