1. Reasons why babies spit up milk It is a very common phenomenon for babies to spit up milk, but parents often don’t know the reasons for spitting up milk. It may be that the feeding posture is incorrect, or the digestion may not be fully developed. In addition, overeating and improper diet in babies can also cause spitting up. 2. How to feed your baby correctly. Correct feeding posture can reduce the chance of your baby spitting up milk. The baby\’s head should be raised slightly to allow the body to maintain a comfortable position. At the same time, pay attention to the amount and speed of eating and avoid overeating or eating too fast. 3. How to deal with the baby spitting up milk. If the baby spits up milk, parents should not panic.