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Many people associate shaky hands with Parkinsonâs disease, but the most common cause of shaking hands is actually essential tremor. Essential tremor is the most common neurologic disorder affecting adults, but itâs not well understood.
Other causes of tremor include the use of drugs such as amphetamines, corticosteroids and drugs for certain psychiatric disorders; alcohol abuse or withdrawal; mercury poisoning; overactive thyroid; or liver failure.