Reasons why babies spit up milk It is a very common phenomenon for children to spit up milk, and many new mothers will be anxious about it. Many people think that vomiting is caused by excessive milk supply or poor digestion. In fact, there are many reasons for spitting up milk. Below we will explain it to you from several aspects. First of all, an important reason for spitting up is the imperfect development of the baby\’s digestive system. Because babies do not have time to fully develop, their stomachs are