Pain in PD:

This is what I experienced last week!
Pain syndromes and discomfort in Parkinson's usually arise from one of five causes: (1) a musculoskeletal problem related to poor posture, awkward mechanical function or physical wear and tear; (2) nerve or root pain, often related to neck or back arthritis; (3) pain from dystonia, the sustained twisting or posturing of a muscle group or body part; (4) discomfort due to extreme restlessness and (5) a rare pain syndrome known as "primary" or "central" pain, arising from the brain.

Information from www.pdf.org