Hypertension is a common and multi-infarct disease, which is a systemic disease characterized by elevated arterial blood pressure, accompanied by physiological or pathological abnormalities in the heart, blood vessels, brain and kidneys and other organs, and is extremely harmful to human health. Therefore, it is important to make people correctly understand the hazards of hypertension and related knowledge, understand and actively carry out prevention and treatment to avoid and reduce the damage of hypertension to the heart, brain and kidneys as well as the occurrence of complications. So, how should one look at hypertension and what are the characteristics of the onset of hypertension? Combined, there are the following points: 1. Early asymptomatic or mild symptoms are not easily detected and can be easily missed. Among patients with hypertension, most of them are asymptomatic in the early stage, and only incidentally find an increase in blood pressure during physical examination or when they visit a doctor for other diseases. There are also a considerable number of people who only show mild headache, head swelling, dizziness or neck swelling, although sometimes they may have neurological symptoms such as irritability, insomnia, lack of concentration, memory loss, etc., but most of them have no characteristic changes, so if the clinician does not pay attention to it, it is very easy to miss the diagnosis. Therefore, it is recommended that middle-aged and elderly people should have their blood pressure measured regularly. 2. Heart, brain and kidney damage are common complications. Hypertension, if not well controlled, can damage the heart, brain, kidneys and other organs. The early manifestation of the heart may have ventricular hypertrophy, and in the late stage there are signs of heart dilatation and heart failure. If combined with coronary artery disease, there are often episodes of angina pectoris. Early kidney damage may include proteinuria, small amount of red blood cells or tubular pattern, and further development of azotemia and uremia, anemia, swelling, acidosis and a series of renal failure manifestations in the late stage. The most common neurological complication of hypertension is cerebrovascular accident, i.e. cerebral thrombosis or cerebral hemorrhage. Patients can develop headache, vomiting, aphasia, blindness, limb immobility, hemiparesis, convulsions or coma and other signs and symptoms, and the mortality rate is very high. 3. The severity of the disease is not consistent with the degree of high or low blood pressure. There is no proportional relationship between the severity of the disease and clinical symptoms in hypertensive patients. Some patients have diastolic blood pressure levels in the range of 95-104 mmHg without significant evidence of left ventricular hypertrophy or other organ damage. Some patients have left ventricular hypertrophy or other organ damage changes, but have no conscious symptoms, as normal. In addition, cerebrovascular accidents, renal failure, and heart failure are not always seen in severe hypertension, and some mild hypertension can occur. Therefore, the prognosis of hypertension does not simply depend on the level of blood pressure and the severity of general conscious symptoms, but must take into account the level of blood pressure, heart, brain, kidney damage and clinical symptoms, and comprehensive analysis, in order to make a correct judgment. Warm tip: Hypertension does not always have symptoms, the severity of the disease and clinical symptoms are not proportional to each other, you can not use the severity of symptoms to estimate blood pressure Therefore, you should measure blood pressure frequently and seek medical advice in a timely manner to avoid life-threatening cardiovascular and cerebrovascular accidents. For people with high-risk factors should pay closer attention to blood pressure.