Parkinson's disease patients typically experience resting tremors, which often appear as the earliest symptom. This is usually manifested as a pill-rolling motion in the fingers on one side, which may later progress to the same-side lower limb and the opposite-side limbs. It can also occur in the jaw, lips, and other areas. The involuntary rhythmic shaking occurs at rest and may decrease or stop when changing positions or during movement. The tremors can worsen with emotional changes, and a small number of patients may experience action tremors. Action tremor refers to noticeable shaking in the affected body part during movement, which diminishes or disappears at rest.