question: This has been about 10 years that i am facing a kind of involuntary movement in some parts of my body.The problem is that whenever i am called on stage suddenly or in classroom by my teacher i become excessively nervous and i feel wave-like something coming from my toe to hand(one hand) bending fingers of my hand and sometime whole body.The situation lasts for few seconds.At this moment i cant even hold a pen in hand.Sometime the situation occurs in normal circumstances like while starting to walk,while standing up or even when i am on bed.