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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, also known as familial tremor, benign essential tremor or hereditary tremor is a rhythmic shaking movement caused by involuntary muscle contractions. This tremor, termed essential because it is not related to an underlying disorder, most frequently affects the hands and neck; it generally spares the muscles of the torso and lower ...