Patient: Hello! My baby is two and a half months old. On March 22nd at 4pm, the baby cried a lot and stopped crying after passing stool on his own during a visit to the provincial hospital 3-4 hours later. A red mucus was found on the diaper, but no red blood cells were found in the test. The child was in good condition afterwards. On April 3, the same thing happened as last time, but no specific cause was found. I am very anxious! Experts: Acute intussusception is a common and unique disease in infancy, common within 2 years of age, with infants aged 4 to 10 months, and decreasing with age after 2 years, rare at 5 years. Intussusception can occur throughout the year, with the highest incidence in late spring and early summer, and may be related to upper respiratory tract infection and lymphadenovirus infection. It is called infantile intussusception within 2 years of age. The main clinical features are: 1. paroxysmal crying and restlessness Sudden paroxysmal regular crying, lasting about 10-20 minutes, accompanied by hand and foot movement, pale face, refusal to eat, abnormal pain performance, then there are 5-10 minutes or more of temporary quiet, and so on repeatedly. 2. vomiting Initially milk and milk lumps or other food, later turned to bile-like substances. 3. abdominal mass. 4. jam-like blood stool Blood-like stools Blood in stool occurs in more than 80% of infants with intussusception. Most of the blood stools are passed 6 to 12 hours after the onset of the disease, and are thin mucus or jelly-like jam-colored blood stools, which can be repeated after a few hours. Diagnostic methods: 1, abdominal ultrasound is the preferred method of examination, which shows “concentric circles” in the cross-section of intussusception. 2.Gas enema After gas injection, a dense soft tissue mass in a semicircular shape can be seen at the top of the loop, protruding into the colon, and the front of the gas plug forms a distinct cup shadow, and sometimes some of the gas can be seen entering the sheath to form different degrees of pincer shadows. One side of the diagnosis is also undergoing enema repositioning treatment. Non-surgical treatment: air enema reset intussusception Various images of the intussusception mass are seen after the injection of gas into the anus, gradually receding toward the cecum until it disappears completely. The rate of air enema repositioning can be more than 95%. After the enema confirms that the intestinal loop has been completely reset, the following observations should be made: 1) the child will fall asleep soon, without paroxysmal crying and vomiting; 2) the child will take 0.5~1g of activated carbon orally, and the black carbon will be discharged from the anus in 6~8 hours. Surgical treatment: Indications for surgery: ① cases with contraindications to non-surgical treatment; ② cases with failed reset by applying non-surgical treatment; ③ small intestinal condyloma; ④ secondary intestinal condyloma.