Oh that's interesting! I have it in my left hand, which I don't write with, but type with. My right hand is ok.
I heard about 2 twin sisters in their twilight years. One had chronic arthritis in her hands the other was free from it.
Only difference was, the twin sister who didn't have arthritis had knitted a big part of her life and the other twin sister did not knit! There's got to be something in that.