3-year-old baby always vomiting, mainly related to indigestion, gastrointestinal obstruction, craniocerebral diseases and other reasons, should be based on different causes to take different treatment. 1. indigestion: due to the weak function of the gastrointestinal tract of children, dietary intemperance or eating too much food, there will be repeated vomiting, abdominal pain and other symptoms of indigestion. 2. Gastrointestinal obstruction: children with vomiting, accompanied by crying, abdominal pain, abdominal distension, abdominal mass and stopping the performance of exhaust, consider the gastrointestinal obstruction. 3. Cranio-cerebral diseases: children vomiting more than, jet, continue to can not be relieved, accompanied by headache, dizziness and other symptoms, should be alert to the occurrence of cranio-cerebral diseases. 4. Other: In addition, the child vomiting may also be hepatitis, cholecystitis and other diseases. 3-year-old baby always vomiting, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.