Parkinson’s disease (PD) symptoms may be related to movement (motor symptoms) or unrelated to movement (non-motor symptoms). Each person with Parkinson's will experience symptoms differently. For example, many people experience tremor as their primary symptom, while others may not have tremors, but may instead have problems with balance.
By definition, Parkinson’s is a progressive disease. Although some people with Parkinson’s only have symptoms on one side of the body for many years, eventually symptoms will also affect the other side. Symptoms on the other side of the body often do not become as severe as symptoms on the initial side.