For people with high risk of hypertension, hypertension can be prevented by adjusting their living and dietary habits; low blood pressure generally occurs less frequently without any special cause, and generally does not require special prevention. There are regional and ethnic differences in the prevalence of hypertension in China, and the prevalence gradually increases with age. High-sodium and low-potassium diets are one of the major risk factors for the development of hypertension in China. Hypertension can be prevented in the following ways 1. Reducing body weight and practicing good exercise habits. 2. Dietary aspects: reduce sodium intake, the best daily salt amount is not more than 6g/person; supplement potassium intake, eat more fruits and vegetables; reduce fat intake. 3. Quit smoking and limit alcohol. 4. Reduce mental stress and relax appropriately. 5. Supplement folic acid when necessary. In addition, once found that the blood pressure continues to be abnormal should promptly seek medical treatment, under the guidance of the doctor scientific treatment.