There are many reasons for involuntary body tremors, when this happens, it is recommended to visit a hospital for a checkup to find out the cause and then take timely treatment measures. If it is a resting tremor on one side of the limb, it may be Parkinson’s disease, but Parkinson’s disease is usually seen in elderly people over 65 years old, and may be accompanied by mask face, slow limb movement, small walking gait, panic gait and other manifestations. In addition, if there is a tremor in the head and also in the upper extremities, you can consider idiopathic tremor, a condition that progresses more slowly and for which there are no effective drugs. If the tremor is in both upper extremities, it may be caused by pulmonary encephalopathy or hepatic encephalopathy. It is recommended to consult a hospital for blood analysis and arterial blood gas analysis and other related tests.