What is intussusception? It is the proverbial knot in the intestine. It is an intestinal obstruction caused by a part of the intestinal canal and its mesentery being snapped into the neighboring intestinal canal. Because it is an intestinal obstruction, and because it occurs in infants under 1 year old who are not very articulate, it can be considered a real emergency. Most of them are caused by intestinal dysfunction due to various reasons, and some of them are induced by organic lesions of the intestinal canal. Clinically, there are four major symptoms: abdominal pain, vomiting, blood in stool and abdominal mass. The abdominal pain in children is characterized by paroxysmal crying, blood in stool appears later and is not easily detected, manifesting as blood on the surface of stool, jam-like stool, and crimson blood, and abdominal masses can only be felt by doctors. The success rate of air enema within 24 hours of the onset of the disease is between 90%-95%, but the success rate of air enema is greatly reduced for those who are late or have bloody stools or fever, and the only treatment for those who fail is surgery, so sometimes the decision of which treatment to choose is in the hands of the parents. The decision of which treatment to choose is sometimes in the hands of the parents.