There are many reasons why children vomit when they drink water, such as abdominal cold, gastroenteritis, indigestion and other causes. 1. Abdominal cold: abdominal not pay attention to warmth, long-term in a cold and wet environment, will lead to abdominal cold and stimulate the gastrointestinal tract contraction, causing symptoms of vomiting. 2. Gastroenteritis: When eating improperly, it will cause inflammatory reactions such as congestion and edema of the mucous membrane of the gastrointestinal tract, which will stimulate the gastrointestinal tract and cause vomiting and diarrhea when drinking water. 3. indigestion: eating too much or eating too often, will increase the burden on the gastrointestinal tract, so that indigestion, gastrointestinal peristalsis slows down, so that drinking water will have an impact on the gastrointestinal tract and the symptoms of vomiting. In short, children drink water vomiting symptoms strong, to take the child to the hospital pediatrics in a timely manner.