Stroke is a clinical syndrome divided into two categories: hemorrhagic stroke and ischemic stroke, and its risk factors include: 1. controllable factors: including hypertension, myocardial infarction, hyperlipidemia, diabetes mellitus, true erythrocytosis, sickle cell anemia, smoking, sedentary lifestyle, and obesity; 2. uncontrollable factors: including age, gender, ethnicity, and family history. Among them, the older the age, the higher the risk of stroke; the incidence rate of men is significantly higher than that of women; the incidence rate of blacks is relatively higher; and people with a family history of stroke have a higher risk of stroke than the general population.