My GP asked me where I wanted to go, to a specialist in rheumatoid arthritis, but, he didn't thing anything would come out, because of lack of swollen joints, redness or clear inflammation, or, to see a hand ergo therapist. I chose the latter. She gave me lots of exercises to relax my hands.
When I went to see her, things were that painful that I could not even write my own name, without dropping the pen. After a few weeks I could write without a problem.
Whenever my hands get painful again, I do some of her exercises. And, that does help.
First exercises were to learn to relax the wrist, and to keep the hand relaxed.