I can relate to your problem because the exact thing happened to me several years ago before I was Zevism. I thought I'd share my experience besides the advice given in case it could also help.
During the worst of this time I could not even brush my hair or put on clothes for the first few hours of the day because of stiffness and pain. I was not able to play any instruments at all at this point. I had no health insurance so I searched carpal tunnel exercises and found these:
https://bj09gkcjd3-flywheel.netdna-ssl.com/wp-content/uploads/2018/03/carpal-tunnel-exercises-2.jpg
I've done them ever since and I think they were a big help.
The second thing I did was figure out how to get out of the type of work I was doing. I had 2 jobs one heavy lifting and the other a factory with strenuous hand movements. I quit the worst of the 2 for my hands and eventually got into work that rarely required physical labor. I also started reducing my bills and debts so I had more flexibility of were I had to work.
Eventually I got were I could play music again but it did take me a few years. Mostly because of job and finance issues which I solved very slowly.
My ability to play instruments went from none to 2 hours. Unfortunately I had tingling for awhile but it stopped. Now I can finally play as much as I have time for but I stop as often as needed to stretch and take breaks.
I think just taking time to stretch every hour would help prevent this in many cases. I know some jobs don't consider this but that's because they are behind the times.
Another note is I do take joint supplements for other issues that contain gelatin and similar so I'm not sure maybe those can help as well as Ol Argedco suggests? I also agree on the weight lifting theory from my experience. I now do more natural exercises like the yoga Lydia suggested as well as hiking and bicycling. I know others have suggested some Martial Arts for good workout alternatives, but personally I haven't had time to try yet.
Additionaly as a Zevist we can also speed our recovery with healing workings and positive affirmations. Even in my situation I stayed positive that my problem would heal and it did eventualy! So I think you can heal this and defeat it with the added benefits of being a Zevist, and maybe a lot faster as well!