Pretend this is a left hand.
See those red arrows? I put those there to show where my pinky is hurting. It's at the joint between the intermediate phalange and the proximal phalange. It has definitely helped to lay off piano for several weeks. Massive doses of ibuprofen have helped, too.
Today I practiced, just a bit, before the Organ Lady came in. The pinky didn’t hurt too much. At this one point, however, I had trouble even lifting my pinky (the circled numbers are the fingers).
Note that the pinky holds down the G, then picks up and presses it right back down. My pinky doesn’t want to pick up, much less press back down. It would rather just stay down.
This could, of course, be due to lack of practice. I’m hoping it is.
Many thanks to my favorite arpeggist for pointing out that the IMSLP site is alive and kicking.