April is Parkinson's Disease Awareness Month, which make this a good time to learn about the symptoms of Parkinson's disease.
An estimated 1 million people in the U.S. and more than 10 million people worldwide are living with Parkinson's disease, according to the American Parkinson Disease Association.
Parkinson's disease is a progressive nervous system disorder that affects movement. Parkinson's disease signs and symptoms can be different for everyone. Early signs may be mild and go unnoticed. Symptoms often begin on one side of your body and usually remain worse on that side, even after symptoms begin to affect both sides.