Causes of vomiting in children: 1, acute gastritis: the disease occurs mostly in preschool or school-age children, often with irritating food or irregular diet, abdominal pain and discomfort after eating, can be accompanied by nausea or vomiting, less food during the course of the disease, often accompanied by indigestion symptoms, can be accompanied by Helicobacter pylori infection, laboratory tests for H. pylori antibodies or positive carbon 13 respiratory test, triple therapy or quadruple therapy is more Effective, if the stomach mucosa erosion bleeding, vomiting blood or black stool can occur. 2, gastrointestinal disorders: mainly seen in small children, mainly because of the immature development of the gastrointestinal tract of small infants, gastrointestinal regulation function is poor, easy to appear bloating, diarrhea, constipation and other symptoms. 3, periodic vomiting: children often repeatedly or periodically appear vomiting, vomiting during the onset of more serious, vomiting after the spirit is poor, often last for several years, there may be a family history, after strenuous physical activity, fatigue or upper respiratory tract infection and the onset of vomiting 10 times a day, about 5 days or a week, vomiting is very violent, vomiting after the spirit is poor, there is weakness or headache, some cases have abnormalities in the electroencephalogram, every year Some children have different degrees of consciousness disorders, need to do EEG, combined with biochemical examination, whether there is electrolyte disorders, 4, intracranial lesions: intracranial lesions, if not accompanied by other central nervous system symptoms, the disease is easy to cover, some children for a long time only show vomiting, obstinate vomiting, prolonged course of the disease may appear mental or consciousness disorders, limb movement or balance disorders, cranial lesions or Progressive aggravation of occupying lesions can be life-threatening and require cranial CT to further clarify the presence of central nervous system lesions. 5, gastric torsion: small infants with loose ligaments are susceptible to this disease, can spit out gastric contents without bile-like material, can be diagnosed by gastrointestinal imaging and gastroscopy, 6, esophageal atresia: after birth that is more saliva, from the oral cavity overflow, each feeding that choking and coughing. 7, congenital hypertrophic pyloric stenosis: usually appears 2 weeks after birth, manifested as frequent vomiting, progressive aggravation, olive nucleus-like masses can be palpated in the abdomen. 8, congenital megacolon: abdominal distension, vomiting, vomiting fecal material, constipation and diarrhea alternately, physical examination can be seen abdominal distension like a drum. 9, annular pancreas: a developmental abnormality, due to its compression of the duodenum, resulting in early vomiting in infants, also need gastrointestinal imaging to help diagnose. 10. Intussusception: Acute vomiting with crying and blood in stool, which can be diagnosed by abdominal ultrasound. 11, gastroesophageal reflux, pyloric spasm: a functional disorder, the diagnosis needs to exclude organic diseases. 12, superior mesenteric artery compression syndrome: common in long and thin children, more common in girls, caused by compression of the horizontal segment of the duodenum by the superior mesenteric artery, narrowing of the intestinal lumen, delayed gastric emptying, gastrointestinal imaging and abdominal CT can help diagnose.