Parkinson's disease is a progressive movement disorder caused by loss of dopamine-producing cells deep in the brain. It affects over 10 million people worldwide (Parkinson's Foundation), usually after age 60 — and modern treatment keeps most patients independent and active for many years.
What is Parkinson's disease?
Dopamine is the brain's "movement lubricant." As dopamine cells decline, movements become slow, small, and stiff, and a rhythmic tremor may appear at rest.
Common early symptoms
- Tremor of a hand at rest, often one-sided at first
- Slowness of movement; handwriting getting smaller
- Stiffness and reduced arm swing when walking
- Softer voice and reduced facial expression
- Loss of smell, constipation, and acting out dreams (years earlier)
Risk factors
- Age over 60; slightly more common in men
- Family history in a minority of cases
- Certain pesticide exposures; head injuries
How is it diagnosed?
Parkinson's is a clinical diagnosis by pattern recognition — tremor character, tone, gait, and response to medication. Imaging serves mainly to exclude mimics. Essential tremor, medication side effects, and other conditions must be carefully separated: the treatments differ completely.
Treatment options
Levodopa remains the most effective medicine; dosing is tailored and adjusted as the disease evolves. Adjunct medications smooth response fluctuations. Botox helps drooling and dystonia; physiotherapy, voice therapy, and regular exercise are genuinely disease-modifying for function.
Natural ways to help
Aerobic exercise — brisk walking, cycling, swimming — is the best-proven non-drug therapy in Parkinson's. Add strength and balance training, a fibre-rich diet for constipation, and good sleep habits.
When should you see a neurologist?
For any resting tremor, unexplained slowness or stiffness, frequent falls, or when current medication no longer lasts between doses.
Emergency warning signs: sudden inability to move or walk, high fever with stiffness after stopping medication, confusion, or falls with injury — seek urgent care.
Key takeaways
- Not every tremor is Parkinson's — pattern matters.
- Levodopa keeps working; schedules just need refining over time.
- Exercise is real medicine in Parkinson's.
- Non-motor symptoms (smell, sleep, constipation, mood) deserve treatment too.
- Never stop Parkinson's medication suddenly.
References
Parkinson's Foundation. (2024). Statistics & early signs. https://www.parkinson.org International Parkinson and Movement Disorder Society. (2015). MDS clinical diagnostic criteria for Parkinson's disease. NICE. (2017). Parkinson's disease in adults (NG71).