Brain & nervous systemHealthy agingLiving with chronic illness

5 health risks linked to Parkinson's disease

Parkinson's is connected to lung problems, depression, and more.

Jan, 2026
LearnNeurologyParkinson's disease5 health risks linked to Parkinson's disease
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Depression
Pneumonia
Digestive trouble
Sleep disturbances
Dementia

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Parkinson’s disease, a debilitating condition in its own right, doesn’t operate in a vacuum. Once it starts progressing, it puts you at risk for a number of other conditions.

Parkinson’s is a brain and movement disorder. When you have it, the cells of the brain producing the chemical dopamine—responsible for movement, among other things—degenerate, leading to less and less dopamine over time. This produces classic Parkinson’s motor symptoms like tremors, stiffness, slow movement, and poor balance.

Since Parkinson’s affects the brain, related symptoms and diseases can arise at the same time. “There’s been a sea change in the last few years in that we think about how Parkinson’s disease affects the whole brain instead of just the motor centers,” says neurologist Matthew Robertson, MD, with Portsmouth Regional Hospital in New Hampshire. 

Here are five other symptoms or conditions that people with Parkinson’s might encounter.

Written byPatrick Sullivan.
Medically reviewed byAmy Gonzales, MD.November, 2024
Sources: Parkinson’s Foundation. Depression. Accessed November 29 + 9
  1. Parkinson’s Foundation. Depression. Accessed November 29, 2022.
  2. Parkinson’s UK. Drug Treatments for Parkinson’s. Last updated July 2019.
  3. Chang YP, Yang CJ, et al. Risk factors for pneumonia among patients with Parkinson's disease: a Taiwan nationwide population-based study. Neuropsychiatr Dis Treat. 2016 Apr 27;12:1037-46.
  4. Won JH, Byun SJ, et al. Risk and mortality of aspiration pneumonia in Parkinson’s disease: a nationwide database study. Scientific Reports. 2021. 11, Article number: 6597.
  5. Merck Manual Consumer Version. Aspiration Pneumonia and Chemical Pneumonitis. Medically reviewed September 2022.
  6. Poirier AA, Aube B, et al. Nonmotor Symptoms of Parkinson’s Disease: Gastrointestinal Ramprasad C, Douglas JY, Moshiree B. Parkinson's Disease and Current Treatments for Its Gastrointestinal Neurogastromotility Effects. Curr Treat Options Gastroenterol. 2018 Dec;16(4):489-510.
  7. Zheng LF, Liu S, et al. Dopamine and Gastrointestinal Motility. Dopamine in the Gut. 2021. Springer, Singapore.
  8. Parkinson’s UK. Sleep and Night-time Problems in Parkinson’s. Last updated March 2019.
  9. Sleep Foundation. REM Sleep Behavior Disorder. Updated November 1, 2022.
  10. Alzheimer’s Association. Parkinson's Disease Dementia. Accessed November 29, 2022.

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