Sudden weakness of hands and feet is considered to be cerebrovascular disease. If it is unilateral weakness of arms and legs, it may be caused by cerebral lesions, including cerebral hemorrhage and cerebral infarction, which are seen in basal ganglia and corona radiata, or cavernous cerebral infarction, small amount of cerebral hemorrhage, and usually there is no unconsciousness obstruction, cerebral edema, and increased intracranial pressure. In the case of large cerebral infarction, hemiparesis can occur, as well as hemianopsia, and speech dysfunction can occur in left-sided lesions, as well as impaired consciousness, and urinary and defecation disorders. In case of bilateral limb weakness, it may be caused by lesions of the brainstem, with dizziness, malaise, balance disorder, nystagmus, dysphagia and choking on drinking water, and in severe cases, bulbar paralysis, or urinary and bowel disorders, which are manifested as urinary and bowel retention and urinary and bowel incontinence. Cranial magnetic examination can clarify the diagnosis.