The baby cried and vomited because the baby’s gastrointestinal development is imperfect, violent crying cold air, secretions and other stimuli caused by vomiting, but if accompanied by diarrhea, bloating, stop defecation, defecation, etc. may be gastrointestinal diseases, the need for timely medical attention. The baby’s gastrointestinal function is not well developed, the stomach is low, even in a quiet situation may appear spitting up, eating too full, crying is more likely to appear, the baby will swallow a large amount of air, mouth and nose secretions, stimulation of the pharynx caused by vomiting, with the increase in age gradually get better, is a normal physiological phenomenon. But if the baby in addition to crying and vomiting, accompanied by diarrhea, bloating or anal stop defecation, defecation and other symptoms, may suggest gastroenteritis, intestinal obstruction and other diseases. Baby crying and vomiting may also have other causes, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.