Observing your baby’s stool is an important way to understand your baby’s digestive status and an important basis for adjusting your baby’s diet. Generally speaking, infants have 2-4 bowel movements per day, and some parents are often confused: Why does my baby have a bowel movement only once every 3 or 5 days? Is there something wrong with my baby? Generally speaking, within 12 hours after birth, the baby starts to pass fetal stool, which is black-green or dark green, sticky, odorless, and somewhat like asphalt for paving, usually within 2-3 days. 3-4 days after birth, the fetal stool gradually transitioned to ordinary baby stool. Within four months of breastfeeding children’s stools are mostly golden yellow, occasionally thin as water after thick soup-like, can be slightly green, sour taste, no odor, 2-4 times a day defecation, infant babies are generally 1-2 times a day stool. Babies such as 2-3 days only once, stool properties as usual, the child weight gain, good mental state, there is no need to filter, it may be general constipation, but if at the same time appear bloating, abdominal pain, vomiting, etc., can not be considered general constipation, should be promptly sent to the hospital for examination. For babies with constipation in the neonatal period, it is necessary to consider the possibility of congenital megacolon. In this type of baby, the meconium is defecated only 12 hours after birth or 3-5 days after birth, followed by constipation and difficulty in defecation, accompanied by abdominal distension, lack of appetite, vomiting, poor growth and other manifestations. At this time, the baby may have a few days of “relief” after simple treatment, such as anal finger diagnosis, laxative, bowel cleansing, etc., and resume defecation on their own, while some of the accompanying symptoms (bloating, vomiting, etc.) disappear, but the symptoms may return soon afterwards, and so on and so forth, be alert to congenital megacolon. Simply put, congenital megacolon is a disease in which the distal colon lacks ganglion cells, resulting in spastic contraction of the intestinal canal, followed by secondary dilatation of the proximal intestinal canal. Therefore, if your baby has similar symptoms, prompt medical attention is recommended. Tests that can help in the diagnosis include: standing abdominal films, colorectal enucleation, rectal anorectal manometry, rectal biopsy, acetylcholinesterase assay, etc. A simple outpatient standing abdominal radiograph can reveal abnormal and extensive inflation and dilatation of the colon. Further colonic enucleation angiography can basically clarify the lesion, and the colon shows the typical manifestation of “spastic segment, migrated segment and dilated segment”. Rectal biopsy can clarify the presence of ganglion cells in the intestinal canal, which is the gold standard for the diagnosis of congenital megacolon. After the diagnosis is confirmed, surgery is recommended as soon as possible. In typical megacolon, most babies show symptoms from birth. For older babies and infants with a similar history of constipation, it is important to be on the alert for enteric neuronal dysplasia and megacolon like disorders, which have clinical symptoms similar to megacolon, except that the constipation symptoms appear later and worsen progressively, sometimes until adolescence. Of course, there are many other diseases associated with constipation in babies, such as fetal fecal obstruction syndrome, congenital intestinal atresia, anorectal malformation, neonatal peritonitis, neonatal necrotizing small bowel colitis, left hemicolectomy syndrome, hypothyroidism, prematurity, functional constipation, and electrolyte disorders. Finally, early diagnosis and treatment of congenital megacolon is an effective way to improve the outcome of treatment. Nowadays, many parents and friends are troubled by this disease in their babies, so let’s pay attention to the baby’s poop together and give the child a healthy life.