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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.
Causes of Types of Tremor: Review the cause informationfor the various types of Tremor: 1  Resting tremor - when tremor occurs in resting positions.  Postural tremor - when tremor results from attempts to maintain postures.