My OH had it on two fingers of his right hand. The fingers were locked up in the mornings and took till late morning to unlock, and were very painful to unlock. People must have wondered about his funny handshake :o :o :o
It was diagnosed as trigger finger and he had it fixed in a bupa hospital (as he had private cover). He was in overnight, probably didn't need to be in at all, but it's all money, isn't it lol. I think they scraped out the tendon sheaths or something, a cut at the base of each finger. He had his hand bandaged and arm in a sling for a few days, the stitches out after a week and absolutely no problems thereafter.