According to research studies, the prevalence of monoplegia has been on the rise in recent years, and it is not limited to the middle-aged and elderly, but some young people may also suffer from monoplegia due to some trauma or disease. Experts believe that heart disease, hypertension and atherosclerosis, metabolic disease, etc. may be the cause of monoplegia and should be taken seriously. 1, blood diseases: such as thrombocytopenic purpura, erythrocytosis, leukemia, often cause hemorrhagic cerebrovascular disease. 2, intracranial vascular development abnormalities: aneurysms and arteriovenous malformations due to abnormal intracranial vascular development are common causes of subarachnoid hemorrhage and cerebral hemorrhage, and they often rupture and bleed several times. 3, hypertensive disease and atherosclerosis: are the main and common causes of cerebrovascular disease. Some data show that 93% of patients with cerebral hemorrhage have a history of hypertension, 86% of patients with cerebral thrombosis also have a history of hypertension, and 70% of patients with cerebrovascular disease have a history of atherosclerosis. 4, heart disease: heart disease is one of the main causes of cerebral embolism. Rheumatic, hypertensive, coronary arteriosclerotic heart disease and subacute bacterial endocarditis may produce attached wall thrombus, and when heart failure or atrial fibrillation occurs, it prompts the thrombus to dislodge and flow to cerebral artery and embolism occurs. Since the embolus can be dislodged repeatedly, it is easy to recur. 5, metabolic disease: such as diabetes, hyperlipidemia, etc., are closely related to cerebrovascular disease. It is reported that 30% to 40% of patients with cerebrovascular disease have diabetes, and the incidence of atherosclerosis in diabetic patients is 5 times higher than normal people, and the time of atherosclerosis is earlier than normal people, and the degree of atherosclerosis is also heavier.