Patients with high blood pressure may have life-threatening conditions at any time if they do not take regular antihypertensive medication and monitor their blood pressure and develop hypertensive crises, for example. Blood pressure is mainly the pressure on the sidewalls caused by the flow of blood. The blood pressure depends on the cardiac output and the resistance of peripheral blood vessels in the body circulation. If hypertensive patients do not regularly take antihypertensive drugs and monitor their blood pressure, and are in a state of elevated blood pressure for a prolonged period of time, it may lead to coronary atherosclerosis, which may lead to acute myocardial infarction, which can be life threatening. Secondly, long-term high blood pressure may also involve the brain and kidneys, which may cause ischemia and degeneration of the cerebral blood vessels, which may lead to cerebral hemorrhage and the formation of cerebral thrombosis. When the kidneys are involved, it will lead to ischemia of the renal parenchyma and reduction of renal units, which may lead to acute renal failure in a short period of time, and thus may lead to a life-threatening situation at any time. Hypertensive patients should take antihypertensive drugs and monitor their blood pressure as prescribed by the doctor in their daily life, and should consult a doctor immediately after any uncomfortable symptoms occur.