What Is the Difference Between a Delusion and a Hallucination in Parkinson’s Disease Psychosis?

Psychosis can make you see things that aren't there and believe things that aren't true.

Psychosis can manifest itself in a few different ways. Andrew S. Feigin, M.D., director of the Fresco Institute for Parkinson’s & Movement Disorders at NYU Langone Health, walks us through the different forms it can take, including delusions and hallucinations.