I burned out my drawing hand by using it too much. The common word for it is writer's cramp. The fancy words for it are focal dystonia. The symptom in my case was a pinky finger that went spastic when I tried to draw.
Scott AdamsOne of the great things about being ignorant is that I often think my ideas are original. It's a wonderful feeling. That's why I try to avoid any knowledge that would spoil the sensation. Sometimes it isn't easy. People keep hurling knowledge at me, and I can't always duck.
Scott Adams