Pheochromocytoma releases large amounts of catecholamines continuously or intermittently, causing persistent or paroxysmal hypertension, and multiple organ function and metabolic disorders. Some patients with pheochromocytoma may have low blood potassium, mainly because the catecholamines secreted by pheochromocytoma promote the entry of potassium ions into the cells, and the catecholamines also promote the secretion of aldosterone. Catecholamines also stimulate the secretion of aldosterone, which has the effect of sodium and potassium retention, allowing the body to excrete potassium ions from the urine, thus aggravating hypokalemia.