I've had both my Carpal Tunnels "done" years ago. Left and Right wrists.
The most common symptom is numbness in the fingers (not thumb) nor in the little finger. There is pain sometimes, but mainly numbness of the fingers. Surgery is the only cure for it.
As for RSI, which I used to get, I use a very basic Logitech corded mouse when I work. I've tried all the whizzbang mouses, but the little Logitech works best for me. I also keep my wrist flat on the desktop when using the mouse. It's just a matter of training your wrist to lay flat. No mousepad or anything fancy.
This way I can work 12 to 16 hours without wrist pain.
