The common causes of pediatric vomiting are as follows: 1. When a child eats too much milk, resulting in gastrointestinal indigestion, vomiting will occur. 2. When a child falls asleep immediately after eating and does not digest, vomiting will also occur. 3. Vigorous activities of older children after eating milk, such as running or jumping, or after exercise will result in gastrointestinal indigestion and vomiting will also occur. 4. The presence of infectious factors such as bacteria can cause gastrointestinal reactions, so there will be vomiting. 5, common diseases of the surgical system, such as acute appendicitis attack children will vomit, will vomit milk. 6, common surgical system of intestinal obstruction or intestinal overlap and other surgical diseases, the baby will also appear to vomit milk.