"Carpal tunnel syndrome occurs when tendons or ligaments in the wrist become enlarged, often from inflammation, after being aggravated. The narrowed tunnel of bones and ligaments in the wrist pinches the nerves that reach the fingers and the muscles at the base of the thumb."
I had it in both wrists way back when (mid '70s from emeory). It was when I was working, studying, and doing lots and lots of writing. Wrist braces, rest, massage, anti-inflammatopries can all help. But the greatest one is rest, I'm afraid. Massage (up the wrist) may help.
If you use the right hand for the mouse, change it to the left. Where your hand leans on the deslk when working the mouse could be creating a pressure spot. And one of those padded bars that goes in front of the keyboard cant hurt. And check your desk/chair height and typing 'posture'.
Look it up on google. Here's a few links.
http://www.ninds.nih.gov/disorders/carpal_tunnel/detail_carpal_tunnel.htmhttp://www.healthinsite.gov.au/topics/Carpal_Tunnel_Syndromehttp://www.medicineau.net.au/clinical/surgery/CarpTunnel.htmlhttp://www.therapygloves.com/carpaltunnelsyndrome.html?gclid=CIHR--uPypQCFR4vagodrXQ-kQ - this one os for some 'infra red' gloves that are supposed to be helpful. If it looks good to you (i haven't read it all) check with your doctor.