The causes of hypertension are not necessarily eight, the etiology of primary hypertension is not clear, risk factors include genetic factors, poor lifestyle, etc., secondary hypertension is related to certain diseases. Primary hypertension is closely related to genetic factors and poor lifestyles such as long-term high-salt diet, alcohol consumption and smoking. Secondary hypertension may be related to kidney diseases such as glomerulonephritis and chronic pyelonephritis; endocrine diseases such as primary aldosteronism, hyperthyroidism and pheochromocytoma; and cardiovascular diseases such as aortic valve insufficiency. When high blood pressure occurs, you need to go to the cardiovascular department of the hospital in time for treatment, under the guidance of the doctor to clarify the cause of the disease and treat the cause.