The systolic blood pressure reaches 174mmHg, which is already grade 3 of hypertension, a more serious state of high blood pressure that is more harmful to the body. If you are in hypertension grade 3 for a long time and your blood pressure is not well controlled, it will cause continuous damage to the heart, brain, kidneys and other important organs, and cause the occurrence of corresponding complications. The most common ones are ischemic heart disease, such as angina pectoris, acute myocardial infarction, etc., hemorrhage or ischemic cerebrovascular disease, such as cerebral thrombosis and cerebral hemorrhage, as well as glomerulosclerosis, which leads to the decline of renal function, and the patient may even suffer from uremia and other critical conditions. In addition, the blood pressure can also damage the blood vessels of the retina at the bottom of the eye, affecting the normal condition of vision. If the blood pressure is at level 3 for a long time, it is necessary to add drugs to reduce the blood pressure to the normal range and minimize the damage to the target organs.