Catecholamines mainly include epinephrine and norepinephrine. Epinephrine and norepinephrine can enhance myocardial contraction and increase cardiac output, as well as constrict blood vessels, leading to an increase in blood pressure. When the human body secretes too much catecholamines due to pheochromocytoma or adrenal medullary hyperplasia, the following symptoms can occur: i. Hypertension, patients can show paroxysmal hypertension or persistent hypertension with paroxysmal exacerbation, which can be accompanied by headache, excessive sweating and nervousness. Catecholamines can cause increased myocardial contraction and accelerated heart rate, resulting in panic, palpitations and agitation. Third, catecholamines can affect human metabolism, leading to increased thermogenic processes, and can also affect sugar metabolism, resulting in abnormal sugar metabolism and even diabetes.