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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.
Consuming certain substances can cause hand tremors. Too much caffeine can cause the jitters in the hand. According to the National Institutes of Health, alcohol has also been linked to hand tremors. Alcoholism, excessive drinking and withdrawal from alcohol can all lead to hand tremors.