Pediatric surgery deals with surgical treatment of congenital or acquired diseases in newborns and children. By understanding the characteristics of children different from adults, it includes small inguinal hernia, appendicitis, congenital biliary obstruction, congenital esophageal obstruction, liver and kidney tumors, etc. And it covers the diagnosis, surgery, and postoperative treatment of diseases leading up to it. A hernia is a condition in which tissues or organs protrude through hiatuses or abnormal gaps between organs (especially the abdomen). Over time, hernias may repeat, and adhesion to surrounding tissues may become severe, resulting in increased pain. Since the hiatuses are narrow, the organs of the intestine or stomach become sleepy, and blood flow may be blocked and rotten, so surgical treatment is required.