If an elderly person has sudden onset of hemianesthesia, it should be considered to be caused by acute cerebrovascular disease, which is generally caused by damage to sensory conduction pathways, such as the thalamus, and this situation should be promptly examined and treated at a hospital to clarify whether it is cerebral hemorrhage or cerebral infarction, and treated symptomatically. In case of cerebral infarction, patients can be treated with thrombolysis, fibrin-lowering, anticoagulation, antiplatelet, and promotion of neurological recovery in the acute stage. If it is caused by cerebral hemorrhage, the patient is treated symptomatically with dehydration, lowering cranial pressure and promoting neurological recovery if the bleeding volume is small. If the bleeding volume is large and there is a risk of brain herniation, the patient should be operated to remove the hematoma to save the patient’s life, and then the patient should be given systematic rehabilitation treatment at a later stage to restore the functional activities of the patient’s limbs.