The correct diagnosis of congenital megacolon requires a physician experienced in pediatric surgery to draw conclusions based on the child’s symptoms, physical examination, and the necessary medical tests. The following conditions should be noted in children: a. The time of the first fecal discharge of the newborn. If the first stool is passed after 24 hours, it should be taken seriously. Nowadays, hospital births account for the majority of births, and some children are hospitalized in isolation wards for various reasons after birth, so parents have no way to know the exact time of the first fetal stool discharge, so they should promptly ask the obstetric hospital about the situation at that time. It is advisable for the obstetric hospital to record the exact time of the first bowel movement in the discharge record. Second, the symptoms of constipation caused by intestinal dysfunction are mild, not accompanied by symptoms such as abdominal distension, and can be relieved after general treatment. In contrast, children with congenital megacolon are characterized by persistent constipation with abdominal distension, often requiring 3-5 days to pass a stool, and the interval between individual children can be as long as half a month. Third, functional constipation due to intestinal dysfunction usually does not have serious consequences, but congenital megacolon, if left untreated, may have a series of serious complications, such as severe malnutrition, infection, and even sudden emergencies, such as gastrointestinal perforation, explosive small intestine colitis, etc., which threaten the life of the child, so parents should not be careless.