Spitting up is a common symptom in infants under 6 months of age. If an infant spits up too much milk, it is not pathological; if the infant spits up a lot of milk, or continuously or repeatedly, it is pathological. A common cause of spitting up is swallowing too much air while sucking on the breast. When air enters the stomach, it expands the stomach and increases the pressure in the stomach, squeezing out the milk. In addition, autonomic dysfunction, etc., is also related to spitting up. For overflow caused by excessive sucking of milk by the baby, attention should be paid to the correct method of breastfeeding to avoid inhaling too much air. After breastfeeding, hold the baby vertically and pat him/her on the back a few times to see the effect. Pediatric massage can help infants eliminate air from the stomach, strengthen the digestive function of the stomach, regulate autonomic nerve function and prevent the occurrence of vomiting.