You don't say what the cause is, but if it is heavy use of a computer 
keyboard, here's a suggestion.

I use a computer many hours a day and eventually had carpal tunnel in both 
wrists bad enough to have braces on both hands. Then I read an analysis 
somewhere that the syndrome comes from having the hands bent backward toward 
your body as you type -- a physically stressful position. 

The solution suggested was to raise the back of the keyboard up higher than 
the front so that your hands are bent down toward the desk top, which is not 
stressful.  I put a piece of wood under my keyboard to raise the back about 
an inch and a half.

In about ten days or two weeks the problem disappeared. That was more than a 
year ago. I still have the braces, but have never needed them since.  

I also put a small board under the mouse pad and raised it too. 

Good luck.  George A.