1. What are the causes of vomiting in babies? Vomiting in babies is one of the common symptoms in infants and young children, and its causes may include many factors. The most common causes are indigestion, infections, and allergies. Indigestion may be caused by improper feeding, eating too much or too little, eating too fast, etc.; infection may be caused by pathogenic microorganisms such as bacteria and viruses; and allergies may be caused by certain substances in food or the environment. 2. Symptoms of indigestion causing baby vomiting When the baby has digestive problems