Level 21: Why does the baby spit up milk? It is very common for babies to spit up milk, and there may be many reasons for it. First, it may be caused by your baby eating too much or eating too fast. Secondly, it may be caused by the fact that digestion is not fully developed and the stomach cannot hold too much food. In addition, if the mother does not correctly grasp the feeding position when breastfeeding or the breastfeeding time is too long, it may also cause the baby to vomit milk. Level 2: How to relieve baby’s spitting up milk? If your baby spits up frequently, here are some things you can try to help alleviate the situation. First, you can adjust the feeding posture and time