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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 (ET) is a progressive, neurological disorder characterized by tremor, most often of the hands or arms. A tremor is an involuntary, rhythmic, movement of a body part.Tremor may be seen as involuntary shaking or trembling of the affected area.ssential tremor (ET) is a progressive, neurological disorder characterized by tremor, most often of the hands or arms. A tremor is an involuntary, rhythmic, movement of a body part.