Pheochromocytoma can also manifest as back pain, but this typically occurs when the pheochromocytoma has grown very large and is more likely to cause it. Generally, the initial symptoms are more often high blood pressure. After the increase in blood pressure, it can indirectly cause symptoms such as arrhythmias, palpitations, excessive sweating, or dizziness. Therefore, judgment must be based on the situation. If the patient has long-term uncontrolled hypertension, or fluctuating blood pressure, it is important to consider testing for pheochromocytoma. For pheochromocytomas, unless they grow very large and compress surrounding organs, it is rare for abdominal pain to occur. Therefore, a thorough examination is necessary for a clearer diagnosis.