Parkinson’s disease, also known as tremor palsy, is a chronic disease of the central nervous system that affects the mobility of patients, mostly occurring in middle-aged and older people. The early manifestations of the disease include resting tremor, myotonia, slow movement, difficulty starting movements, and postural abnormalities. Other early symptoms include difficulty in starting activities, followed by frequent tremors in the arms and legs, and inability to make fine movements in the upper limbs, resulting in inability to take care of oneself in daily life, such as difficulty in dressing, taking off shoes, and washing up. The main factors of disability are motor retardation, myotonia and postural disorders. Parkinson’s disease is often associated with depression, anxiety, limb pain and discomfort, constipation, excessive sweating and salivation. Parkinson’s disease varies from person to person, with some people experiencing severe neurological damage and others doing a little better. The disease may initially affect only one side of the body (left or right), and soon after, symptoms may appear on both sides of the body. Generally, the condition changes over time, with different symptoms appearing at different times, and the condition can get worse. Usually the memory and intelligence of people with Parkinson’s disease are more or less affected from person to person. The most common symptoms are as follows: Resting tremor: or hand tremor, the most common symptom of Parkinson’s disease, with involuntary shaking in one or both arms. There is also shaking in the legs, feet or jaw. A slight movement of the part that is shaking will reduce the shaking, and the shaking usually does not occur during sleep. Stiff limbs or muscle contractures: Because the brain’s message to relax does not reach the muscle tissue. Muscle stiffness can lead to muscle pain or inability to straighten the body. Slow movement: Another common symptom is the difficulty in getting in and out of bed, turning over, standing or sitting, and other normal movements. You may not be able to walk with a full stride, but instead walk in small steps. People with Parkinson’s disease sometimes experience “freezing”, a feeling of being unable to move on their own. Blinking, changes in facial expressions, swaying of the arms when walking, and other involuntary behaviors may be slower than normal. Lack of balance: The body position is often forward-leaning when standing, and difficulty in rising from a sitting position, which often causes the patient to fall. Other symptoms: abnormally slow speech and dull tone; shaking hands when writing, smaller and smaller words; inability to swallow food, etc. In addition, constipation is also one of the common symptoms of Parkinson’s disease. Elderly people who have one of the above symptoms should seek medical attention in time to stop further aggravation of the disease.