Acute Appendicitis refers to an acute suppurative infection in the vermiform process of the ileocecum of the human body, with its clinical feature of pain primarily at the upper abdomen or around the umbilicus, and then at the right lower abdomen gradually, accompanied by the clinical manifestations of tenderness, rebound tenderness and muscular tension at the McMurray point of the right lower abdomen, and possible fever, aversion to cold, nausea, vomiting, and constipated stool, etc.