[Buskerdoo]

I had a similar problem awhile back.
The pain got so bad I couldn't do anything with my right arm/hand for days at a time.

Did the doctor deal, etc etc.

I figured on my own it was all about how I used my mouse.

Here's what worked for me:

One or two weeks of no activity with that arm.
Took Aleeve for a couple weeks. I hate the stuff, but in this case I made an exception.
Used a mouse pad that raised my wrist for awhile.
Make sure that my arm is all the way on the table up to my elbow. My elbow rests on the table/desk when I mouse.
At the slightest hint of fatigue with my right arm I either stop or switch to my left hand for awhile.

I took about 1 year to heal and I still have fair-ups.