Hypertension can be divided into primary and secondary hypertension according to whether the cause is clear or not. The cause of primary hypertension is not clear enough and is the result of a combination of both genetic and environmental factors. Secondary hypertension is hypertension caused by other diseases or definite causes. Hypertension caused by kidney disease is the most common type of secondary hypertension. Primary hypertension accounts for more than 90% of hypertension, but the cause has not yet been discovered, and is only known to be formed by a combination of genetic and environmental factors. The hereditary nature of hypertension is demonstrated by the increased likelihood of hypertension in children if their parents have a history of hypertension. Patients with both parents suffering from hypertension are more likely to get hypertension than those with only one parent suffering from hypertension, but the influence of heredity on hypertension is significantly lower than that of lifestyle and environmental factors. Most cases of essential hypertension are associated with unhealthy lifestyles. A high-salt diet, overweight or obesity, chronic excessive smoking and drinking, chronic mental stress and lack of exercise are risk factors for essential hypertension. In addition, age is also a cause of vulnerability to hypertension. Men >55 years old and women after menopause are prone to hypertension. This is because as age increases, blood vessels become more rigid, which increases the resistance of blood vessels around the body and raises blood pressure. Secondary hypertension accounts for about 5% of hypertension. Younger patients with hypertension tend to have secondary hypertension. Kidney disease? Primary aldosteronism? pheochromocytoma, etc. can cause secondary hypertension. Secondary hypertension is poorly treated with medication and must be treated for the cause, which can be effectively reduced or even restored to normal after removal. Since most hypertension is associated with unhealthy lifestyles, it is important to understand the risk factors that lead to hypertension and to prevent it in advance. There is no corresponding term for hypertension in Chinese medicine, but it can be classified as “vertigo” and “headache”. The etiology of hypertension is understood through the symptoms of vertigo, headache, stroke, and hyperactivity of liver yang. It is believed that the cause of hypertension is mainly due to the loss of balance between the yin and yang of the liver and kidney meridians. The main causes are (1) physical strength and weakness; (2) internal injuries of the seven emotions and fire in the heart and liver; (3) dietary disorders and phlegm; (4) overwork and disorders of qi and blood.