The main reasons for newborns choking and spitting up are: too fast breastfeeding, incorrect breastfeeding posture, baby gastrointestinal dysfunction, lactose intolerance and so on. 1. too fast breastfeeding: for example, some of the mother’s milk secretion is more, the flow speed is too fast, has exceeded the newborn’s swallowing speed, will cause the child choking, spitting up the situation. 2. Incorrect breastfeeding posture: for example, some mothers do not let the baby in the head high and feet low position to breastfeed, or even lying down to breastfeed, it is easy to lead to the backflow of milk, resulting in the baby choking, spitting up the situation. 3. Baby gastrointestinal dysfunction: it is easy to cause the baby’s gastrointestinal tract peristalsis slows down, and then produce choking, spitting phenomenon. 4. Lactose intolerance: some babies can’t digest the lactose in breast milk well, so it’s easy to lead to increased osmotic pressure in the intestinal lumen in the process of breastfeeding, choking, spitting, bloating and other manifestations. In short, there are many reasons why newborns choke and spit up, if it is caused by physiological factors, usually do not have to worry too much, but if it is caused by pathological factors, must be as soon as possible for the original disease, targeted treatment.