Parkinson Disease https://www.nivabupa.com/disease-articles/10-facts-about-parkinson-disease-you-should-know.html Parkinson's disease is a progressive neurological disorder that primarily affects movement. It occurs due to the degeneration of dopamine-producing neurons in the brain, leading to symptoms like tremors, rigidity, slowness of movement, and impaired balance. Parkinson disease can also cause non-motor symptoms such as sleep disturbances, cognitive changes, and mood disorders. While there is no cure, treatments like medication, therapy, and lifestyle changes can help manage symptoms and improve quality of life.