I have muscle
leg, foot, arm and hand twitches. I was diagnosed, (among other things) with
Restless Leg Syndrome (RLS). It does not necessarily only affect your legs.
There is also something called Periodic Limb Movement, but as I understand it, this only happens when you're asleep. RLS, on the other-hand, can be all day and all night. It usually is at its worse when you try to sit still at night.