I Googled RSI and came up with Repetitive Stress Injury. Maybe that's why I was able to get rid of my diagnosed "severe carpal tunnel syndrome" with splints, drastically reducing the repetitive stress (in my case, typing), and citrus bioflavanoid supplements.
I went to the doctor soon after my fingertips started tingling and going numb. I think I had occasional pain in my wrists also but it's been so long I don't remember anymore. Also can't remember the name of the test they gave me. Basically they measured an electrical current running through my arm to each finger (both arms). Based on the results of that test, I was diagnosed with severe carpal tunnel in my right hand and moderate carpal tunnel in my left. The hand specialist I was sent to said I would need surgery. When I said I wanted to try natural remedies first, he said categorically that I would be back for the surgery.
Some of us don't give up easily! I bought splints from Walmart because the ones the doctor's office had given me didn't seem to be very good. Instead of just wearing them at night and while typing, I wore them all night and all day -- took them off only for tasks I couldn't do with them on (such as showering!). I had my husband change my un-ergonomic computer setup and cut my computer typing to less than half what I'd been doing. I Googled CTS and incorporated some exercises and citrus bioflavanoids into my daily routine. As I recall, it took a good six months to be sure I had seen significant improvement, and a full year before all the tingling was gone and I was confident I could go without splints all day long. Eventually I stopped wearing the splints at night also, although I put them back on at night if I suspected even a glimmer of wrist pain or finger numbness.
Aside from all this, I think a huge key to my success in eliminating CTS (or RSI) was that I took action right away. I'm pretty sure if I had waited a year before changing my habits the inflammation would have resulted in permanent changes in the carpal tunnel requiring surgery. Based on what I read online, my problem was inflammation of the carpal tunnel. My aim was to get rid of that inflammation before permanent damage was done, and I think I succeeded in that.
For me, it was worth wearing the splints all day and all night to avoid surgery.