The reasons why blood pressure cannot be controlled should be seen from the aspect of life behavior: 1, some patients are overweight, if weight reduction will improve blood pressure and can improve diabetes, hyperlipidemia and left ventricular hypertrophy, etc. 2, too much sodium intake, because the daily amount of salt should not exceed 6g, too much will lead to high blood pressure, often eat more fresh fruits and vegetables, milk, etc. can replenish the body needs of potassium, calcium and other elements, also good for blood pressure control. 3, from the aspect of drug intake clinical many patients are not regular oral intake, should stop smoking, limit alcohol consumption and increase physical exercise can make blood pressure control. The blood pressure can also be controlled by eating a low-fat diet, quitting smoking, limiting alcohol consumption and increasing physical exercise. 3, from the aspect of medication, many patients do not regularly take oral antihypertensive drugs and do not monitor blood pressure, the patient’s poor compliance is also the reason why blood pressure cannot be controlled. 4, some patients with age, blood pressure will also be higher than before. If combined with diabetes, coronary heart disease or high creatinine, blood pressure is also not well controlled; 5, secondary hypertension, the presence of renal hypertension, renal artery stenosis or primary aldosteronism and other secondary causes.