Secondary hypertension is associated with certain diseases or the use of certain medications, and treatment of the primary disease should be actively pursued. 1.Diseases: (1):Renal diseases, such as acute and chronic glomerulonephritis, chronic pyelonephritis, and renal artery stenosis, can cause secondary hypertension. Primary aldosteronism can also cause secondary hypertension, as well as hypokalemia and alkalosis. Pheochromocytoma can present with persistent or paroxysmal hypertension. (2) Cardiovascular diseases and craniocerebral lesions can also cause secondary hypertension, such as aortic insufficiency, brain tumors, and traumatic brain injury. Cortisolism can also cause hypertension. 2. Drugs: such as glucocorticoids, sympathomimetic drugs, common drugs are prednisone, methylprednisolone, epinephrine, ephedrine, etc. It is recommended to use the above drugs under the guidance of doctors. When secondary hypertension occurs, it is recommended to go to the hospital in time for consultation and active treatment, so as to avoid delaying the condition.