parkinson's disease how prevalent is it
The most common one is tremor. Tremor, or shaking, often in a hand, arm, or leg, occurs when you're awake and sitting or standing still (resting tremor), and it gets better when you move that body part. Tremor is often the first symptom that people with Parkinson's disease or their family members notice.he most common cause of non-Parkinson's tremor is essential tremor. It's a treatable condition that is often wrongly diagnosed as Parkinson's. Besides tremor, the most common symptoms include: 1  Stiff muscles (rigidity) and aching muscles.