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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.
The term 'essential' means that there is no associated disease that causes the tremor. Essential tremor is known to be familial condition, meaning that it runs in families. At least 5-7 out of 10 people with essential tremor have other members of the family with the same condition.