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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.
Benign essential tremor. Benign essential tremor can cause shaking of the hands and forearms and a quivering voice. Parkinson disease. Parkinson's disease is a disorder of the nervous system causing tremors stiffness and slow movement. Hypocalcemia. Hypocalcemia is a blood condition marked by tingling, muscle spasms and aches, and confusion.