Primary aldosteronism is a common cause of secondary hypertension, and the main clinical manifestation is hypertension with hypokalemia. Aldosterone was discovered in 1953, and its main function is to regulate the tubular cells of the kidneys, retaining sodium and water in the body and excreting potassium ions. More sodium ions and water are retained in the body, which is called sodium retention, i.e. the body is in a state of edema, which can lead to an increase in blood pressure. Therefore, primary aldosteronism can lead to an increase in blood pressure, and symptoms of hypokalemia such as paralysis and fatigue may also occur.