Newborn overflow is commonly known as milk, is a common phenomenon in newborns, compared with older children, but also more unique physiological phenomenon of newborns, as if the baby ate too much, sometimes flowing milk outward along the corners of the mouth, these are generally physiological reactions. First of all, this phenomenon is related to the anatomy of the newborn’s digestive system. The normal adult stomach is inclined and the pancreatic muscles are as well developed as the pyloric muscles. The newborn’s stomach volume is small, the stomach is horizontal, the pylorus muscle is developed, close tight; cardia muscle is not developed, close loose, so that when the newborn eat too much or swallow more air will easily occur overflow, it does not affect the growth of newborns. Secondly, since it is a process, do not be nervous, but take targeted measures. For example, if milk spill can cause a rash, then wipe it in time, using soft and absorbent materials to avoid damaging the child’s skin. For example, after each nursing session, pick up the newborn vertically and pat the back to expel the swallowed air. In some cases, the child’s appetite is too good, or the breast milk is too abundant, exceeding the child’s stomach’s ability to handle it at once, so if the child’s weight is also growing too fast, you can limit the amount or duration of nursing each time. In conclusion, newborn milk spillage is a phenomenon that occurs in almost every child and should be observed and managed objectively.