In outpatient clinics, patients with high blood pressure often ask their doctors, “Doctor, why do I have high blood pressure?” Today, let’s talk about the causes of hypertension. Hypertension is divided into two categories: one is primary hypertension, which is often referred to as hypertension, accounting for 95% of hypertensive patients; the other is secondary hypertension, accounting for 5% of hypertensive patients. I. Secondary hypertension Secondary hypertension is the increase in blood pressure caused by other diseases, common causes are: 1, kidney disease, such as renal artery stenosis, chronic nephritis 2, endocrine diseases, such as pheochromocytoma, primary aldosteronism 3, large vessel lesions, such as congenital aortic constriction, multiple aortitis 4, hypertension during pregnancy 5, cranio-cerebral lesions, such as brain tumors, brain trauma 6, drugs, such as long-term use of hormones 7, sleep apnea. Such as long-term use of hormones 7, sleep apnea syndrome. This part of the patient if the use of antihypertensive drugs alone often poor or ineffective, or after good control of blood pressure in a short period of time, the blood pressure rose again. Therefore, the need for treatment of the original disease, blood pressure can be controlled smoothly. Primary hypertension Primary hypertension is hypertension for which no specific cause can be identified. Although the cause is unknown, but some factors can increase the risk of hypertension, these factors include: 1, genetic factors: family members suffering from hypertension 2, poor dietary habits: high sodium, low potassium, high fat diet, alcohol consumption 3, age: men > 55 years old, women after menopause 4, bad habits: overweight, obesity, lack of exercise 5, bad mood: long-term mental tension, psychological stress, insomnia