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.