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Diagnosis & Treatment. Essential tremor is a type of uncontrollable shake or tremble of part of the body. Most people with essential tremor experience a trembling, up-and-down movement of the hands. The arms, head, eyelids, lips and other muscles can also be affected. A tremor in the voice box (larynx) may cause a shaky voice.
Essential Tremor 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.