Causes of yellow water vomiting in newborns, mainly including congenital pyloric obstruction, gastrointestinal dysfunction, as follows: 1, congenital pyloric obstruction lead: If suffering from congenital pyloric obstruction, in this case, because the pyloric area is particularly high tension, the milk ingested by the newborn can not be effectively peristaltic downward, there will be vomiting. If the degree of vomiting is very heavy, there will be bile vomiting, because the bile in the newborn’s liver is yellow-like, so there will be vomiting yellow water; 2, gastrointestinal dysfunction: If there is gastrointestinal dysfunction, it will also cause abdominal pain, diarrhea and even vomiting, and if the vomiting is particularly serious, there will also be vomiting yellow water. In response to gastrointestinal dysfunction, apply probiotics such as small Pepcid, Mamma’s Love, etc. in a timely manner.