Appendicitis surgery seldom causes bleeding, usually there will be light bloody fluid in the drainage tube, which is mainly caused by oozing from the wound, and the oozing will be reduced or stopped after conservative treatment or observation for a period of time. Sometimes the inflammation of the appendix is more serious, or the inflammation of the appendiceal peritoneum is more serious, which may lead to bleeding of the appendiceal peritoneum after the operation, mainly due to the loosening of the ligature wire, or the corrosion of the blood vessels by the appendiceal inflammation, which may lead to the rupture of the blood vessels or the blood seepage. If the amount of bleeding is relatively small, most bleeding can be stopped after a period of conservative treatment such as hemostasis. If the bleeding is heavy or fast, another operation is necessary to stop the bleeding.