Advances in mechanism research of pain in Parkinson's disease.

Parkinson's disease (PD), a neurodegenerative disease, is very common in middle aged and older people. There are two kinds of symptoms: motor symptoms and non - motor symptoms (NMS). Pain, a commonly reported NMS of PD, can significantly affect the quality of life, thus causing more attention. However, mechanisms of pain in PD is not clear, and need to be further researched. [ABSTRACT FROM AUTHOR]