Nowadays, most infants are constipated, so what are the causes of constipation in infants? This is a question that many parents of infants want to ask. When infants are small, they are often constipated because they can only be fed with milk and watery food. So what are the causes of constipation in infants? The following is an expert to give you some information about the causes of constipation in infants: 1, disease certain diseases can cause constipation such as anal stenosis or congenital muscle weakness. 2, the lack of good defecation habits children should develop the habit of regular defecation since childhood, under the role of conditioned reflexes regular defecation. Children are playful, conscious suppression of bowel movements, over time, the intestinal peripheral nerve sensitivity to fecal stimulation decreased, feces stored in the rectum for a long time, water is absorbed into the dry hard, of course, difficult to discharge. 3, the influence of mental factors children by sudden mental stimulation, such as shock, or change of living environment, etc., can appear temporary constipation phenomenon. 4, food with unreasonable, such as food containing more protein South, containing less carbohydrates, food in the intestinal fermentation process is weak, the stool is dry. A small number of children have the problem of partiality, like to eat fish and meat, do not love to eat fruits and vegetables. Due to the low fiber in food, of course, easy to constipation. Manually fed infants and young children, milk casein and calcium than human milk, class stool contains a variety of insoluble calcium soap, easy to constipation. Newborn (pointed out that less than 28 days after birth) constipation for most of the reasons: 1, artificial feeding: milk contains more calcium soap by digestion, easy to cause dry stools, thus constipation. 2, insufficient milk: if eating less milk, or more vomiting, or feeding rehydrated children can cause a temporary absence of stool. In addition, the newborn’s digestive tract muscle layer is not yet fully developed, so it is easy to cause constipation, but also can be accompanied by vomiting. As long as the child does not lose weight, vomiting and constipation are normal. 3, surgical diseases: possible deformities include intestinal atresia, intestinal stenosis, poor intestinal rotation, congenital megacolon, congenital anus, sacrococcygeal spina bifida, spinal membrane bulge, tumor compression of the cauda equina nerve, etc. These diseases are often accompanied by severe vomiting and abdominal distension, and require timely diagnosis and treatment. Newborns do not poop for a few days is not necessarily constipation newborns because the mechanism of defecation is not mature, so they can not regularly defecate, often to accumulate more stool, the nerves of the rectal wall feel the pressure of expansion, triggering a reflexive solution, which is the reason why some babies only once a few days to solve the stool, stimulated by a thermometer, because it can trigger the reflex, so it can also make it defecate. The above are some of the relevant introduction of the causes of constipation in infants, I hope it will be helpful to you. Children who eat mother’s milk, because the mother’s milk is more completely absorbed, the amount of stool is less, some infants will be several days to solve a stool, not necessarily eat with the solution. Therefore, newborns do not poop for a few days is not necessarily constipation, to determine whether the newborn constipation method is to observe the stool traits, if the traits are normal, not poop for a few days is also normal.