I started to get some symptoms when I got really into tradeskilling for a few months. Swish, I don't know how far progressed your carpal tunnels are, but these exercises (along with a break from the computer for a week) helped me out tremendously. I don't have symptoms anymore.
Really good video.
https://www.youtube.com/watch?v=gTxQqu9USC4
If you can stop doing what it is that's specifically causing it, poor posture etc, and do execises regularly, it's possible to prevent full on carpal tunnel syndrome.
http://www.uwlax.edu/ehs/Ergonomics_Carpal_Tunnel.htm
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Is it possible that jousting on red makes you hit your auto attack key too much? I know it's an issue with bards. Consider getting a mouse with programmable hotkeys on the side. Those things will save your wrists.