The causes of pediatric spitting up include physiological factors, improper feeding methods, and pathological factors. 1. Physiological factors: the infant’s stomach capacity is small, the milk is easy to reflux caused by spitting up. In addition, the infant’s vomiting center is not well developed, is also one of the main causes of vomiting. 2. Improper feeding methods: If the baby cries before feeding, feeding too many times, feeding too much milk, too fast out of the bottle, the temperature and concentration of the milk powder is not suitable, the pacifier is mixed with air, and the position changes too much after feeding, all of them can lead to spitting up. 3. Pathological factors: such as gastroesophageal reflux disease, meningitis, pneumonia, intestinal obstruction, congenital megacolon, intussusception, etc., the child is often accompanied by other symptoms, such as congenital megacolon of the child may also have feeding difficulties, persistent constipation, bilious vomiting, abdominal distension, fever and other symptoms. Children with frequent spitting up, no relief after adjustment, or with other discomforts, should consult a doctor in time, under the guidance of the doctor to identify the cause of the disease, and if necessary, to carry out appropriate treatment.