High aldosterone is generally known to cause a secondary increase in blood pressure. Aldosterone is a steroid hormone that acts primarily on the kidneys to promote the storage of sodium ions in the body while excreting potassium ions. When aldosterone is increased in the body, there is an increase in the reabsorption of sodium ions by the kidneys. When sodium is retained in the body, blood volume increases and the burden on the heart increases. In addition, edema of the smooth muscle of blood vessels, thinning of the lumen, and increased resistance to blood flow all cause an increase in blood pressure. Thus, high aldosterone causes an increase in blood pressure and is a common cause of secondary hypertension. Elevated aldosterone is recommended to be treated in a timely manner after a standardized diagnosis and treatment under the guidance of a physician.