Found out it was psychosomatic. My belief that my pain was caused by structutal damage reinforced the pain. The cause of the pain seemed to rather be a combination of stress, fear, and supressed emotions. When I started working on these areas the pain resolved. It comes back now and then but now I know it's my mind messing with me so I just resolve what's stressing me at the moment and just keep using my hands and then it goes away. I dealt with this shit for years and it severely restricted my life so it's kind of a miracle to be rid of it.

I recommend reading "healing back pain" by Sarno which talks about this phenomena. The book is mainly about back pain but it applies to all kinds of psychosomatic pain. There's also a free forum with free guides and support from others who have dealt with the same: https://www.tmswiki.org/forum/

In particular the success subforum is very inspirational as it contains posts from peoole who have resolved all kinds of pain syndroms that they originally thought were caused by structural injuries (including rsi).

I feel like a shill writing this and I remember I thought people talking about this theory back in the day were paid shills. But I promised myself after I got rid of this huge burden due to the psychosomatic approach I would let people know about it no matter how many downvotes I get.

Search HN, there have been a number of threads on this topic with lots of discussion.

Also, consider that it may be pycho-somatic. No, that doesn't mean you are crazy or the pain is not real it just means your subc mind has zeroed in on your wrists to express conflict (my take). The best book in this area is by John Sarno, Healing Back Pain: The Mind-Body Connection. You can ignore his Freudian rage theory (he wasn't a psychologist) but learn his techniques and you may have success as many people have using his advice, myself included. I completely cured my "RSI" in about a month and can type for hours now without problems.