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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 one of the most common neurological conditions and the most common cause of tremor. Tremor is an involuntary, rhyth-mic shaking of any part of the body.The hands are most commonly affected in ET, but the head, voice, legs, and trunk can also be affected.The term essential, when used in a medical context, refers to a symptom that is isolated and does not have a specific underlying cause. Other neurological disorders â Other than ET, the most common neurological disorders causing tremor are Parkinsonâs disease and dystonia (involuntary muscle contractions), but tremor may also occur with multiple sclerosis or after a stroke.