Comment Strengthening (Score 4, Informative) 178
Disclaimer: I am not a doctor and this is not advice, but have you tried strengthening exercises?
I have to use a very poorly designed desk for computing (think of like an 70s-80s era penpusher desk - now with computer, keyboard, mouse, dual monitor). This has led to some issues, although, not ever as bad as you have described. Recently a friend lent me a gyroscope toy, thingy. Basically you spin it, it provides some resistance and which will gradually build strength in your arm/hand wrist.
I've found it to be really helpful - now I can type without pain and I can even do pushups again. YMMV.
(cue the oblig wrist action comments:).