The gold standard of pheochromocytoma examination is general clinical manifestations combined with auxiliary examination for diagnosis. 1. Clinical manifestations: including episodic headache, profuse sweating, tachycardia; hypertension, refractory hypertension, episodic hypertension; family history of pheochromocytoma; adrenal incidentaloma; pressor response during anesthesia and surgery; polyendocrine gland disease, Carney syndrome, VonHippel-Linda syndrome, etc. 2. Biochemical tests: After stopping catecholamine-interfering drugs and some foods (e.g., coffee, bananas, aspirin, citrus fruits, etc.), 24-hour urinary catecholamine assay, blood catecholamine assay, and 24-hour urinary vanillylmandelic acid are detected. However, some asymptomatic patients have no abnormalities. 3. Imaging tests include CT, MRI, PET-CT and other tests. For more information, please consult a specialist at the hospital and do standardized tests under the guidance of a physician.