Overview

Parkinson's disease is a neurological disorder that gets worse over time and mostly affects movement. Dopamine is a neurotransmitter that is important for smooth, coordinated muscle movements. When nerve cells in a specific part of the brain gradually stop making it, the condition begins to develop. When dopamine levels drop, it becomes harder for the brain and muscles to communicate. Parkinson's disease usually gets worse over time and is more common in older people, but younger people can also get it. It is a long-term illness with no cure, but getting diagnosed early and getting the right treatment can help control symptoms and keep people living well for many years.

Symptoms
Some common symptoms are tremors, which usually start in one hand, muscle stiffness, slowed movements, and trouble with balance or posture. People may also walk with a shuffle, have less expressive faces, and speak more softly. As the disease gets worse, people may also have non-motor symptoms like fatigue, depression, trouble sleeping, and constipation.

Causes
The precise aetiology of Parkinson's disease remains unidentified. People think that a mix of genetic and environmental factors causes it. Ageing is a significant risk factor, and specific genetic mutations may further increase vulnerability. Toxins, head injuries, and oxidative stress have also been linked to the slow death of brain cells that make dopamine.

Diagnosis
There is no one test that can tell if someone has Parkinson's disease. Doctors use a patient's medical history, a check of their symptoms, and a neurological exam. Other conditions may be ruled out with imaging tests like MRI. The way a patient reacts to Parkinson's medications can also help confirm the diagnosis.

Treatment
The goal of treatment is to control symptoms and make daily life easier. Medications that increase or mimic dopamine levels are the mainstay of treatment and can greatly lessen movement-related symptoms. Occupational therapy, physical therapy, and speech therapy help people stay mobile and independent. In some cases, surgery such as deep-brain stimulation may be considered. Making lifestyle changes, exercising regularly, and getting emotional support are all important parts of long-term management. With the right care, many people with Parkinson's disease can still live full, active lives.