There are such people, hands often involuntarily tremble; there are such people, legs often will not step. Some people say that this is a sign of “old age” and is normal. Many people with Parkinson’s disease are misunderstood and unfortunately do not receive proper treatment. What is Parkinson’s disease? Parkinson’s disease is a common neurological condition that occurs in middle-aged and elderly people, mainly due to the loss of dopaminergic neurons in the substantia nigra of the brain. The main manifestations of Parkinson’s disease are involuntary shaking or reduced movement, slowed movement, muscle stiffness, and abnormal posture and reduced expression. The clinical symptoms of Parkinson’s disease are progressively worse, and eventually there is difficulty in getting up or turning over, or even in walking and being paralyzed in bed. Parkinson’s disease does not directly cause death, but it seriously affects the daily life of patients, who often feel “worse than death”. The causes of Parkinson’s disease are not fully understood, but mainly include genetic factors, environmental factors, and age factors. According to epidemiological statistics, the prevalence of Parkinson’s disease is 2 per 1,000 in foreign countries and 0.4 per 1,000 in China, with more men than women. Generally, the onset of Parkinson’s disease is over 55 years old, but in those with a family history of Parkinson’s disease, the onset of the disease is early, even before the age of 22, and in recent years the onset of the disease has a younger trend.