If the elderly have shaking hands and feet, the causes may be the following: 1. If the patient has an acute onset, with shaking and involuntary movements of one side of the hands and feet, the patient is considered to be suffering from acute cerebrovascular disease, such as cerebral infarction and cerebral hemorrhage. 2. If the patient has a gradual slow onset and progressive aggravation, the patient is considered to be suffering from Parkinson’s disease and Parkinson’s syndrome, with the lesion mainly involving the patient’s extrapyramidal system. In most cases, after the progression of symptoms, the patient will also have foot tremors, accompanied by increased muscle tone and slow walking gait. 3, other non-motor symptoms, such as sleep disorders, urinary and stool disorders, intelligent dementia and other problems.