My wife has found benefit using alpha lipoic acid in high concentrations. Even though everyone recommended surgery, she solved the problem in this way.
I switched to a Logitech M575 ball mouse a while ago, and that plus an ergonomic keyboard went a LONG way toward fixing mine, since it was all based off my desk situation.
I went to a neuromuscular therapist for mine. She worked wonders & gave me exercises to help prevent future flare ups. Ergonomic keyboard & using felt-tip pens are also a life saver.
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I'm a musician and this is a lifesaver.
https://uk.rpmpower.com/product-category/nsd-powerball-gyro/