Secondary hypertension is often caused by an identified disease or cause, and there are more than 50 primary causes of secondary hypertension. Different primary diseases require different secondary hypertension checkups. Therefore, it is not possible to list all the items of secondary hypertension examination exactly, and the physician should select the items according to the patient’s clinical manifestations. Secondary hypertension can be triggered by a variety of diseases, such as renal hypertension caused by renal vascular disease and renal disease; hypertension caused by cortisolism and primary aldosteronism. Different primary diseases require targeted examination, such as renal hypertension requires routine urinalysis, renal function tests, routine blood tests, renal artery CT, renal artery angiography, etc.; hypertension caused by hypercortisolism requires dexamethasone suppression test and other items; hypertension caused by primary aldosteronism requires adrenal CT examination. Therefore, when patients undergo secondary hypertension examination, they need to choose the examination program suitable for themselves under the guidance of physicians according to their own clinical manifestations, and do not choose blindly, so as to avoid omission of detection and affect the diagnosis.