If the sudden paralysis of half of the body is considered to be caused by cerebrovascular disease, it is important to immediately consult a hospital for examination and treatment because the paralysis of half of the body may be caused by cerebral hemorrhage or cerebral infarction. In this case, the patient should first improve the CT examination of the head, which can clarify whether the patient has a brain hemorrhage problem. If a brighter, high-density image can be seen on the CT head examination, brain hemorrhage is considered and a follow-up plan will be chosen through the doctor’s evaluation. If the bleeding is relatively large, it may need to be treated by surgery. If the amount of bleeding is relatively small, the patient should be given conservative medical treatment of dehydration, lowering cranial pressure, and preventing continued bleeding. If there is no high-density image on CT of the head, consider that the paralysis in one half is caused by cerebral infarction and the patient is not given aggressive treatment. If the time of onset does not exceed six hours, the treatment option of thrombolysis can be chosen, but the indications and contraindications for thrombolysis must be noted. If this time is missed, the patient can be given treatment such as fibrin-lowering, anticoagulation and antiplatelet aggregation, and at the same time, the patient should be given treatment for cerebral protection to promote the recovery of neurological function.