The first condition is Parkinson’s syndrome, the most common disease of Parkinson’s disease, Parkinson’s disease is a degenerative disease, generally the patient can manifest as resting tremor, resting hand tremor, similar to rubbing mud pills, but also accompanied by a reduction in facial expression, double lower limbs walking small gait, the patient can also appear depression, constipation, sleep disorders The second condition is seen in idiopathic tremor. For hand tremor caused by idiopathic tremor, most of the hand tremor will occur in both upper limbs, and in severe cases, head tremor, tongue and lip tremor will occur. For this kind of idiopathic tremor, there is usually no significant change in head CT or MRI.