The typical clinical manifestations are paroxysmal crying, vomiting, blood in the stool, and a bologna-like mass can be palpated in the abdomen on physical examination. However, since the onset of the disease varies from early to late, the chances of these four typical features being present at the same time are very small, and most children come to the clinic because of crying and vomiting or diarrhea. When intussusception is suspected, it is important to promptly pass stools to see if there are jam-like stools and to confirm the diagnosis by abdominal ultrasound. For those who are clearly diagnosed, they should be reset by air enema as soon as possible, otherwise the delay in early treatment can only take the form of surgery, causing unnecessary pain to the child.