Parkinson's Disease

Parkinson's disease is a condition in which parts of the brain become progressively damaged over many years. It is linked to the loss of nerve cells that produce dopamine, a chemical that helps control movement. As dopamine levels fall, people develop symptoms such as shaking, stiffness and slow movement. Parkinson's usually develops gradually, and its progress varies a great deal from person to person.

Parkinson's disease is one of the more common conditions affecting the nervous system, particularly in older adults, and most people are diagnosed later in life. It can, less commonly, begin before the age of fifty. It affects people of all backgrounds and is somewhat more common in men. The number of people living with Parkinson's is rising as populations age.

The main symptoms are a tremor (often a shaking that starts in a hand), slowness of movement, and stiff or rigid muscles. People may also notice changes in balance, smaller handwriting, a softer voice or a reduced sense of smell. Non-movement symptoms such as tiredness, sleep problems, low mood and constipation are common too. Symptoms usually start mild and worsen slowly.

The exact cause is not fully understood. It is thought to involve a combination of genetic and environmental factors that lead to the loss of dopamine-producing brain cells. Increasing age is the main risk factor, and having a close relative with Parkinson's slightly raises risk. Most people who develop the condition do not have a clear single cause or a strong family history.

There is no single test for Parkinson's disease. A specialist makes the diagnosis based on your symptoms, medical history and a physical examination of movement, posture and reflexes. Scans or other tests may be used to rule out conditions that can look similar. Because symptoms develop slowly, diagnosis sometimes becomes clearer over time as a specialist reviews how the condition changes.

Although Parkinson's cannot be cured, treatments can help control symptoms for many years. These often include medicines that boost or mimic dopamine, supported by therapies such as physiotherapy, occupational therapy and speech and language therapy. In selected cases, surgical options may be considered. Care is usually provided by a specialist team and is adjusted over time as needs change, with a focus on staying active and independent.

Because the cause is not fully known, there is currently no proven way to prevent Parkinson's disease. Regular physical activity and a generally healthy lifestyle are good for overall brain and body health, though they are not shown to prevent the condition. If you notice early symptoms such as tremor or unusual slowness, seeing a doctor allows for proper assessment and timely support.