The elderly suddenly shiver on the body for the following reasons: 1, may be caused by infectious diseases, such as pneumonia, upper respiratory tract infection disease, when there is a high fever will have the performance of chills, the patient will have shivering on the body, cold symptoms, followed by an increase in body temperature; 2, the elderly suddenly shiver on the body to consider is caused by hypoglycemia, mainly seen in patients with diabetes, may be The application of glucose-lowering drugs in too large a dose or too much activity, eating too little, it is easy to appear hypoglycemia, and manifested as a sudden body shivering, accompanied by panic, sweating, hunger feeling is more serious. The patient’s blood sugar is usually lower than 3.9 mmol/L, and the symptoms can be completely relieved by supplementing food. 3. The sudden shivering in the elderly should also be considered to be caused by epilepsy, and if the patient has a seizure with corkscrew, loss of consciousness, and double vision, this should be considered as the cause, and can be clarified by doing an EEG examination.