Pediatric hernia is one of the most common diseases in pediatric surgery and hernia surgery and mainly includes two types of congenital inguinal hernia and umbilical hernia. The main factors of pediatric hernia are congenital factors, inguinal hernia is mainly caused by unclosed sphincter, umbilical hernia is due to failure of the umbilical ring to close in time, premature and low weight infants due to incomplete growth and development at birth. What are the symptoms of pediatric hernia? 1. A mass appears in the inguinal region or umbilical orifice that is sometimes absent or sometimes large or small. The masses appear or become larger when the intra-abdominal pressure is increased by standing and crying, and they disappear after lying down or stopping crying in the early stage of the disease or after pressing by hand. Parents often bring their children to the clinic because they find small localized swellings in the groin, asymmetry on both sides of the scrotum or a mass at the umbilicus. 2. If the mass cannot be returned to the abdominal cavity, there will be increased abdominal pain, crying, followed by vomiting, abdominal distension, poor defecation and other symptoms of intestinal obstruction. In the groin or scrotum, oval-shaped masses with hard texture and obvious tenderness are visible. In case of prolonged intussusception, the skin is red and swollen, and if the intestine cannot be retracted for a long time, serious complications such as ischemic necrosis of the intestine may occur. With age, the hernia sac will continue to increase in size and the possibility of entrapment and strangulation may occur, even causing testicular or ovarian infarction and atrophy, so it should be treated at the right time.