I have trigger thumb. I did mention to my oncologist and he said it was not from med. I also started having hip joint pain back last May , enough that I had to stop going to gym. Trigger thumb just all of a sudden started during the night when it got stuck and I couldn’t straighten it. This has been since November.
I stopped my Anastrozole for 3 months. It didn’t improve any of my issues, so I started it up again. I’ve taken it for 2 years 2 months counting the break away from it. Unfortunately, arthritis gets the blame for everything that doctors can’t explain or do not want to deal with. Best of luck to you. 🙏🏼