The common sign of pheochromocytoma is high blood pressure. It may be always high or sometimes high. Sometimes this tumor can cause life threatening high blood pressure. It is a rare case and should be considered when medicines are not enough to control high blood pressure. Other symptoms are less common and each person’s symptoms may vary. The other symptoms noticed are faster pulse, faster heart beat, headache, nausea, vomiting, clammy skin, sweating, shaking, anxiety and flushing.