I am experiencing an involunatry shaking of the hand when I lay it flat or hold it up. What is this?
Victoria
I am 14 years old and healthy. I don’t think I have any diseases that could cause such a tremor, and I’ve never experienced this before. It’s been going on for almost 17 hours now; it started while I was playing tennis yesterday.
What is this, and how can I stop it? It’s interfering with my writing!!

I’d say is compression on a nerve from swelling of the muscle while playing tennis.
Rest it in a comfortable position to stop it shaking. Use a pillow to rest it on and relax it.
If it continues go see you Doctor.