Today we will talk about a human endocrine hormone that is closely related to the development of hypertension – aldosterone. Understanding what aldosterone is will help our patients to better understand how this type of hypertension occurs. Aldosterone is a hormone secreted by our body itself, and is a salt corticosteroid. It is produced in the adrenal glands of the body. What does aldosterone do? Aldosterone can be used to maintain water and electrolyte balance and normal blood volume by regulating the levels of some chemical elements in the body. It is mainly acts on the distal convoluted tubules and collecting ducts of the kidneys to induce sodium retention and potassium excretion. Retaining sodium in the body, sodium is retained in the body, the sodium content in the body is high, the osmotic pressure of the blood rises, and the water that was to be excreted out of the body also stays with the retention of sodium, causing a rise in blood volume. After we have a lot of exercise or sweating in the heat, the loss of water in the body is serious, the blood volume is reduced, through a series of complex physiological mechanisms, in order to maintain electrolyte balance, the body secretes aldosterone, so that sodium retention, “salt” in the blood vessels, the blood is “salty “salty”. Water from outside the blood vessels into the blood vessels, replenishing the blood volume. The body returns to a dynamic balance. When the body’s aldosterone increases, it will cause excessive accumulation of sodium in the blood vessels, blood volume rises, water rises, causing hypertension. Therefore, some of the patients with hypertension are caused by an increase in aldosterone, and we need to pay attention to identify the causes of hypertension.