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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: Causes, symptoms, diagnosis and treatment. A person with essential tremor, or ET, experiences uncontrollable shaking, trembling or tremors in parts of the body. Essential tremor is a nerve disorder affecting around 4% of people over 40.The symptoms of essential tremor often affect arms and hands, but can affect other areas such as the feet, head, face, jaw, tongue and voice. Tremors may be classed as mild, moderate or severe.ssential tremor is a nerve disorder affecting around 4% of people over 40. The symptoms of essential tremor often affect arms and hands, but can affect other areas such as the feet, head, face, jaw, tongue and voice. Tremors may be classed as mild, moderate or severe.