Spitting up is a common phenomenon for many little babies. This is precisely because the newborn baby’s stomach and throat are not yet mature, so it will be easy to spit up when eating milk. If a baby eats milk too fast with too much gas or too much milk, it is easy for the milk to flow backwards from the stomach into the mouth and spit out from the mouth, which is spitting up. Spitting up is a relatively normal physiological phenomenon for small babies, and usually occurs in the first 3 months of life. If you want to avoid spitting up, you mothers must pay attention when breastfeeding and reduce the inhalation of air when your baby eats milk. Babies who are breastfed are less likely to spit up than those who are bottle-fed because they inhale a lot of air when they drink from a bottle, but not when they are breastfed. Also, some illnesses can cause spitting up in small babies, in which case there is more spitting up, wellsprings, or lumps of milk. It is often within 30 minutes after feeding, and is accompanied by crying and poor mental state. If the baby has vomiting, but as long as the baby does not have any other physical abnormalities, is in good spirits, does not vomit much, and has not lost weight, it is considered to be related to the physiological structure and function of the child, and can be improved by adjusting the amount of food, strengthening care, patting the back after feeding, etc. The baby will gradually grow up.