Occasional jet-like spitting up in babies is mostly caused by the imperfect development of the digestive tract, large amounts of food, swallowing too much air and other stimuli, but it is necessary to check for digestive disorders, intracranial infections and other factors. Low-month-old infants gastrointestinal function is not well developed, the stomach is horizontal, small capacity, the stomach connected to the esophagus cardia wide, can not be closed properly, while connected to the pylorus of the small intestine is tight, physiological structure determines that the low months of age of infants are prone to overflow, spit up, when eating and swallowing a lot of air, crying and stimulation, eating too much food, etc. may stimulate triggered by a large amount of spit up, when the seriousness of the jet-like. However, if accompanied by fever, frequent vomiting, diarrhea, vomiting bile-like stomach contents, lethargy, irritability and other symptoms, may suggest the presence of intussusception, intestinal obstruction, intracranial infection and other diseases. Occasionally, babies spit up in the form of jets, there may be other reasons, it is recommended to go to the hospital, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.