Generally speaking, the causes of milk vomiting in newborns mainly include the following situations. First of all, it is caused by too much milk. If the parents of the newborn give too much milk to the newborn at once, the tension of the newborn’s stomach will be higher, causing the milk in the stomach to surge upwards, thus leading to the situation of spitting up. In this case, if the newborn’s milk quantity is reduced, the newborn’s vomiting will be significantly improved. If the newborn has congenital pyloric obstruction or intestinal obstruction, the parents should perform surgical treatment on the newborn. The last is caused by intolerance to milk powder, if the newborn belongs to the allergic body, allergic to milk protein, will also cause the situation of eating milk powder vomiting, for this situation, parents should promptly do allergen testing for newborns.