Vomiting in four-year-old babies may be caused by indigestion, gastrointestinal cold, acute appendicitis and other reasons. 1. Indigestion: If a four-year-old baby eats cold food or overeats, it may lead to indigestion, causing symptoms such as vomiting. 2. Gastrointestinal cold: It may also be caused by gastrointestinal cold, which is mostly caused by coxsackie virus and other causes. The main manifestations are abdominal pain, vomiting and diarrhea. 3. Acute appendicitis: four-year-old baby vomiting more than may also be acute appendicitis, the baby occurs acute appendicitis, there may be nausea, vomiting more than performance. The four-year-old baby vomiting more than may also have other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.