knitting callus. I has one.
I thought I was developing a (eek!) wart on my finger. It took until I was in the waiting room at the Dr.'s office, where I tend to bring along something to work on so I don't get so anxious & nervous and run away home.

too much knitting, I suppose.
I should be making paintings and drawings instead. It's just that knitting is so portable and less disruptive.