Cerebrovascular disease, heart disease and tumor are currently recognized as the three most serious diseases threatening human life and health worldwide. The second highest number of deaths due to cerebrovascular disease in Japan, the third in the United States, and the first in China for several years, shows the seriousness of the threat of cerebrovascular disease to human life and health, and the incidence of cerebrovascular disease is increasing with the improvement of human living standards, the extension of human life expectancy, and the emergence and increase of the degree of aging of the social population. In response to the high incidence of cerebrovascular disease, high disability rate, high death rate, high recurrence rate, the trend of younger patients and the unsatisfactory treatment effect, medical experts are becoming more and more strongly aware of the importance of cerebrovascular disease prevention. Prevention of cerebrovascular disease is divided into three levels: primary prevention, that is, active treatment of existing risk factors, while regularly monitoring the occurrence of other risk factors and taking targeted measures; secondary prevention refers to individuals who already have risk factors and have stroke aura such as transient cerebral ischemic attack, giving early diagnosis and early treatment to prevent the occurrence of serious cerebrovascular disease; tertiary prevention is for patients who have already suffered a stroke, early or ultra-early Tertiary prevention is the early or ultra-early treatment of patients who have already suffered from stroke to reduce the degree of disability. Targeted preventive measures should be carried out for different population groups. It is very important to spread the knowledge of cerebrovascular prevention among the social population. To prevent the occurrence of cerebrovascular disease, it is necessary to understand under what circumstances and on what basis cerebrovascular disease occurs, and we call this “circumstance” and this “basis” the risk factors of cerebrovascular disease. Early detection and treatment of these risk factors can prevent the occurrence of cerebrovascular disease. At present, we have the following risk factors for cerebrovascular disease: 1, age and gender Cerebrovascular disease can be basically considered as an age-related disease, the incidence of which increases with age, and the incidence doubles with each 10-year increase in age above 55 years. 2, family tendency In our clinical practice, we found that there is a significant proportion of a family with multiple diseases whether it is genetic, has not been confirmed, but found that the issue of family tendency, and the family of hypertension, diabetes and heart disease is positively correlated with the high incidence of heart disease. 3, hypertensive disease The current findings suggest that hypertensive disease is an independent and definite risk factor for cerebrovascular disease. Hypertension can lead to both hemorrhagic cerebrovascular disease and ischemic (cerebral infarction) cerebrovascular disease. 4, diabetes mellitus because of its disorder of sugar metabolism, can make the body of small, medium and large blood vessels hardening, narrowing, blood glucose degree increased, resulting in ischemic cerebrovascular disease (cerebral infarction) occur. 5, heart disease The range of heart disease is very wide, including congenital and acquired heart disease; acquired heart disease includes: valve disease, coronary heart disease, cardiomyopathy, etc.. These heart diseases lead to blood flow disorders, the formation of cerebrovascular disease embolism, through the blood flow into the cerebral vessels embolism that occurs cerebral infarction (cerebral embolism). 6, hyperlipidemia and obesity hyperlipidemia and cerebrovascular causal relationship views differ, but hyperlipidemia prompted arteriosclerosis, on the basis of arteriosclerosis and then cerebrovascular disease; obesity is fat accumulation in the body and the formation of too much, China’s folk early “the longer the pants the shorter the life expectancy” of the Yan Yan. 7, smoking and alcohol abuse smoking is harmful to the social consensus, in addition to the respiratory system and other system damage, in the development of cerebrovascular disease also occupies a certain position, the role of alcohol on cerebrovascular disease, the prevailing view is that alcohol abuse is certainly harmful, and a small amount of alcohol still has some benefits, it has the role of vasodilatation, increase high-density lipoprotein. Therefore, we believe that it is best not to smoke, alcohol can be consumed in small amounts, not more than 100 grams per day. 8, blood rheology abnormalities Confirmation of blood rheology abnormalities as a risk factor for cerebrovascular disease is a matter of the last 10 years or so, according to our monitoring in the past decade, the results are also the same, there is a significant proportion of patients we see, there are no other risk factors but only blood rheology abnormalities. 9. Transient ischemic attack Transient ischemic attack is a clinical manifestation of transient cerebral blood supply deficiency, which can exist for seconds, minutes, hours, and up to 24 hours to completely return to normal, these manifestations can occur suddenly, blurred vision in one or both eyes, distorted mouth, slurred speech, inability or lack of fluency in speech, numbness of one limb, weakness or paralysis of one limb, and movement of one limb. Paralysis, inability to move one limb, etc. These may be the precursors of severe cerebrovascular. 10, stroke Stroke is also known as cerebrovascular disease, and we list it as a risk factor for cerebrovascular disease because: patients who have had a stroke are five times more likely to have cerebrovascular disease than “normal” people of the same age who have not had a stroke, which means that people who have had a stroke are more likely to have another stroke. These risk factors are for the general population, but for some special people, such as women of childbearing age, oral contraceptives can induce cerebrovascular disease, so it has become a consensus that oral contraceptives are a risk factor for cerebrovascular disease.