As with any nerve related disorder, better to let a doctor diagnose. As has been stated a Parkinson's Neurologist will know immediately upon seeing you if your have Parkinson's Disease. I have shoulder and arm nerve pain that I associated with a sports incident in which I separated my shoulder. I attributed it to my shoulder. What I didn't recognize, was the same separation also caused a herniated C6 disc in my neck that was causing the pain and numbness in my fingers...

There's good advice from those above. Good Luck and keep us updated.

John