Suddenly high blood pressure after stabilization of treatment for gastrointestinal bleeding may be caused by over-excited emotions, primary hypertension and secondary hypertension. 1. Over-emotional: Emotional changes also have a certain effect on blood pressure, so it may be caused by the patient’s over-exuberance after the treatment of gastrointestinal bleeding is stabilized. 2. Primary hypertension: if the patient himself suffers from primary hypertension, it may be due to the adjustment of medication during the treatment of gastrointestinal hemorrhage, omission or underdosage of medication, etc., which may also lead to the rebound increase of blood pressure. 3. Secondary hypertension: Another type of secondary hypertension may be caused by the sudden release of catecholamines from pheochromocytoma, resulting in a sudden increase in blood pressure. Therefore, patients are advised to go to the hospital for detailed examination in time to clarify the cause of the disease and target the treatment.