The dangers of secondary hypertension can lead to left ventricular hypertrophy, which can cause atherosclerotic plaque formation in the carotid arteries, as well as renal insufficiency, increased blood creatinine, and can result in urinary trace protein. Secondary hypertension can also cause cerebrovascular disease such as cerebral hemorrhage, ischemic stroke, and transient ischemic attack. It can also cause coronary heart disease, myocardial infarction, angina pectoris and chronic heart failure, and can lead to peripheral vascular disease, as well as retinal lesions such as hemorrhage or exudation and optic disc edema. Therefore, patients with secondary hypertension should adhere to medication treatment in addition to improving their lifestyles.