High pressure is systolic pressure, low pressure is diastolic pressure, systolic pressure 170 mmHg, diastolic pressure 105 mmHg is more dangerous. If patients do not control their blood pressure in time, it can cause various complications such as heart, brain, kidney, fundus, etc., and may even be life-threatening. 1. Systolic blood pressure of 170 mmHg, diastolic blood pressure of 105 mmHg belongs to the second level of hypertension, patients with long-term second level of hypertension is easy to complicate target organ damage, patients with damage to target organs, coupled with daily inattention to the control of blood pressure, often smoking and drinking and other triggers of the impact of the patient can cause coronary heart disease, cerebral infarction, cerebral hemorrhage, hypertensive nephropathy, endophthalmopathy, and so on. 2. Long-term secondary hypertension, or patients intermittent application of antihypertensive drugs lead to unstable blood pressure control, can cause rapid changes in blood pressure, in the emotion, environment, smoking and drinking and other factors, can lead to the onset of the disease, and even if the treatment and rescue is not timely will be life-threatening. After diagnosis of hypertension, it is necessary to choose reasonable antihypertensive drugs under the guidance of the doctor to treat, do not casually stop taking drugs or believe in folk remedies.