I think I’m developing arthritis at the tender age of 42!!! My joints in my fingers hurt and it is so frustrating! I haven’t been diagnosed but figure that is what it is. I do so many things with with hands, I’m a little afraid of having it so young. I try to stay relaxed because tensing up does not help! Hard to stay relaxed when you have small hands and forever struggle to reach notes with 4th finger. I still wonder about getting a 7/8 size violin. Might make a difference.
Best wishes to all.