numbness

I thought this info might help someone else... For months now I've been experiencing and intermittent numbness on the front of my thigh just to the top right of my kneecap. An area maybe 6" in diameter. It will go numb to the touch for a while, like it's had some novocaine injected but there...

So I have been getting a lot of sudden numb feeling in my wrist. I wonder if it has anything to do with a bad technique. I usually play sat down and sometimes I land my arm on the bass, but it's not all the time. Should I go to a doctor? I usually warm-up my wrist and stuff to avoid it but it...