If the baby is cold or intestinal viral or bacterial infection is not heavy, vomiting is generally not too serious, if the baby drink water are vomiting to consider the following situations: First, pay attention to the possible existence of more serious viral or bacterial infection caused by dehydration, the situation is bad will cause drinking water are vomiting. Second, we should pay attention to the possible serious vomiting or other problems resulting in water-electrolyte imbalance, especially low potassium, low sodium intestinal motility slow vomiting. Third, we should pay attention to whether there are surgical problems, such as intestinal obstruction or severe pancreatitis, cholecystitis, and even appendicitis can occur when the appendix is more serious vomiting.