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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.
Idiopathic Parkinson's disease - hand tremor more causes...Â» See full list of 41 causes of Hand tremor. How Common are these Causes of Hand tremor? This information refers to the general prevalence and incidence of these diseases, not to how likely they are to be the actual cause of Hand tremor. Of the 41 causes of Hand tremor that we have listed, we have the following prevalence/incidence information: 1  1 causes are very common diseases. 2  2 causes are common diseases. 3  0 causes are uncommon diseases. 4  0 causes are rare diseases. 5  0 causes are very rare diseases. 6  39 causes have no prevalence information.