Children vomiting yellow water, need to consider acute gastritis caused by severe vomiting, or have surgical diseases such as acute cholangitis, intussusception and so on. 1. Acute gastritis: Inflammation of the mucous membrane of the stomach due to the use of unclean food or bacterial or viral infections causes severe vomiting. 2. Acute cholangitis: children with acute cholangitis will not only vomit vomit mixed with bile, but also have right upper abdominal pain, fever and other symptoms, and in severe cases, jaundice, high fever, shock and other manifestations. 3. Intussusception: It is one of the more serious acute abdominal diseases in children. Due to the abnormal anatomy and structure of children, the intestines will be overlapped, which will cause paroxysmal abdominal pain, severe vomiting, abdominal mass and other phenomena, and those who are not treated in time will make the intestines necrotic, which will lead to serious consequences. Children vomit yellow water, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to determine the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.