what causes uncontrollable shaking
A. Essential tremor (ET) is a nerve disorder characterized by uncontrollable shaking, or tremors, in different parts and on different sides of the body.Areas affected often include the hands, arms, head, larynx (voice box), tongue, and chin. The lower body is rarely affected.he primary symptoms associated with essential tremor include: 1  Uncontrollable shaking that occurs for brief periods of time. 2  Shaking voice. 3  Nodding head. 4  Tremors that worsen during periods of emotional stress.