Spitting up or overflowing milk is a very common phenomenon in newborns and small infants, and almost every infant has spit up at one time or another. Small infants are prone to spitting up mainly because of their immature stomach, which is horizontal, lying horizontally and unstable when viewed from the front. The entrance of the stomach (cardia), relatively loose, closed tight, easy to be washed away by food, when a little more milk in the stomach, can open the cardia and backflow back to the esophagus and mouth, while the gastric outlet pylorus muscle is better developed, closed tighter, food through the slow, all of the above physiological characteristics are the cause of small infants easy to spit up. If the infant has good weight growth, no signs of distress, and normal physiological indicators, this situation is considered physiological vomiting. If vomiting is frequent and large and weight gain is not present, or if it is accompanied by abdominal distention, diarrhea, fever and other symptoms, the presence of pathological conditions should be considered. The more common ones are gastroesophageal reflux, infection, pyloric spasm, hypertrophic pyloric stenosis, etc. They should be sent to the hospital for further examination and treatment. Improper feeding can also lead to frequent vomiting or vomiting, such as feeding too fast, feeding too much milk, frequent change of milk side, longer crying before feeding, swallowing a lot of air when feeding, etc. Some babies have too much change of position after eating milk, such as changing diapers, etc. can cause vomiting, which will improve after improving feeding methods. Ways to reduce infant vomiting 1. Feed in moderation and avoid overfeeding. 2. Don’t be too quick or too fast when feeding, and pause for a moment in between so that the baby can breathe more smoothly. 3.The pacifier opening should be moderate. If the opening is too small, the baby needs to suck vigorously, while if the opening is too large, the baby will easily choke on the milk. 4.After feeding, let the baby lie upright on the adult’s shoulder and pat the baby’s back to help him/her expel the air swallowed into the stomach. 5.When the baby lies down, the upper half of the body can be slightly padded, preferably in the right side position, so that the food in the stomach does not flow out easily. 6.After breastfeeding, do not let your baby move too much, and do not shake or shake your baby at will. The most fear is that when the milk suddenly reverses from the esophagus to the throat, it will enter the trachea by mistake when inhaling, which is called choking. When the amount is large, it will cause blockage of the trachea and poor breathing, which can even be life-threatening. If the amount is small, it can be inhaled directly into the lungs and cause aspiration pneumonia. In the case of minor spillage or vomiting, the baby will usually adjust his breathing and swallowing actions on his own, so there is no risk of aspiration into the trachea.