The causes of vomiting in children are more varied, and gastroenteritis, intestinal obstruction and other diseases are generally considered in clinical practice. 1. Gastroenteritis: Inflammation of the gastrointestinal mucosa occurs in patients due to infection of the organism by external pathogens such as bacteria, viruses, fungi and parasites. Symptoms of vomiting may occur, usually accompanied by abdominal pain, diarrhea, nausea and so on. 2. Intestinal obstruction: due to various reasons, the intestinal contents cannot pass through the intestines normally, which is mainly due to the constriction of the small intestine and being set into the neighboring small intestine. Patients will have reflex vomiting, often accompanied by abdominal pain, abdominal distension, pallor, sweating and other symptoms. There may be other reasons for the child’s vomiting, it is recommended to go to the hospital in a timely manner, complete the examination to determine the cause of the disease, and then give targeted treatment or therapy.