Hi, Thanks for writing in. Pheochromocytoma is a cancer of the adrenal gland. The adrenal gland secretes steroid hormones and therefore a pheochromocytoma patient might have symptoms because of increased adrenal hormone circulating in blood. Some of the symptoms of pheochromocytoma includes the following episodic and sudden onset of severe headaches sweating abdominal pain high blood pressure not getting controlled with medications rapid heart rate irritability and anxiety Patients also might have increased plasma free metanephrines. Please consult the endocrinologist and get clinically evaluated. Please do not worry.