Usually primary as well as secondary hypertension is determined according to the cause of the disease and the rate of progression and elevation of blood pressure. 1. Primary hypertension: It is more common in clinical practice and is usually caused by factors such as a high salt diet, obesity, alcoholism, smoking and stress, and is not accompanied by other diseases. The course of the disease is usually slow and long, often with a family history, and the blood pressure level will be mildly to moderately elevated. The blood pressure level will be mildly to moderately elevated. Usually, after medication to lower the blood pressure, the blood pressure level will be able to reach a more ideal level. 2. Secondary hypertension: Rarely seen in clinics, it is mainly caused by other diseases in the body. For example, renal hypertension, renal vascular hypertension, primary aldosteronism, pheochromocytoma and so on. The disease usually progresses rapidly and can develop into malignant hypertension, while the blood pressure level will be moderately to severely elevated. Blood pressure levels are poorly controlled after antihypertensive treatment with medication. If there is any discomfort, seek medical attention and follow the doctor’s instructions.