I just got over this same problem. The nerve was compressed in my shoulder and it started with what I thought was carpal tunnel. My fingers started going numb and it progressed into my arm and neck. It took two months of PT and steroids and rest. My bjj instructor weighs about 230 and it occured when I was rolling with him. There was no pain and it didn't start untill two days later.
VOTE FOR PEDRO '08
Ever notice how virtually everyone agrees that 95% of all traditional schools are crap, but NOBODY ever admits to being in that 5%? Don't judge... your skill may suck also...
Quote from SevenStar
Just call me the Shaolin Do Wet Blanket. Gene Ching