Young adults rarely experience Parkinson's disease. It ordinarily begins in middle or late life, and the risk continues to increase with age.
Having a close relative with Parkinson's increases the chances that you'll also develop the disease, although your risk is still no more than about 4 to 6 percent.
Men are more likely to develop Parkinson's disease than women are.
Ongoing exposure to herbicides and pesticides puts you at slightly increased risk of Parkinson's.