Children always vomit can be caused by improper feeding, infectious diseases, digestive obstruction and other factors. 1. Improper feeding: such as feeding when the baby cries, overfeeding, feeding too fast, etc., can lead to pediatric vomiting, generally adjust the feeding method can be improved. 2. Infectious diseases: such as acute gastroenteritis, viral hepatitis, acute upper respiratory tract infections, pediatric vomiting are common symptoms. 3. Gastrointestinal obstruction: including esophageal atresia, pyloric hypertrophy, gastric torsion and other congenital gastrointestinal malformations, as well as intussusception, intestinal torsion, gastrointestinal foreign body and other diseases triggered by gastrointestinal obstruction, can lead to frequent vomiting in children. Children always vomit, should promptly seek medical attention, under the guidance of the doctor to identify the cause of the disease, and appropriate treatment, not blind judgment, so as not to delay the condition.