It is now commonly accepted that non-motor symptoms of Parkinson's disease often outweigh and sometimes even antedate the development of motor symptoms of PD. It can prove to be more disabling and more challenging to treat and it clearly impacts quality of life in PD. This article provides a concise review of non-motor features in Parkinson's disease as well as the pathophysiological mechanisms underlying each complication. Currently available management strategies will be outlined as well.