Why is it my arm/hand will twitch if I am in a certain position?

Question

Like if Im laying in on my side and my arm is in an awkward position, it will twitch at a steady pace.

Umm...why?

Answer 1

When you sit in a certian position causing a limb to twitch, you are trapping a nerve or pressing on a certain pressure point on the limb.  Happens to me alot and it feels quite funny