Babies suddenly spit up to consider the following reasons: 1, gastrointestinal cold, resulting in indigestion caused by sudden spitting up, hot compresses on the abdomen or clockwise massage of the abdomen can be relieved. 2, intestinal infections, caused by sudden vomiting, often accompanied by diarrhea, abdominal pain, fever, etc., should be to the hospital for stool routine, blood tests, under the guidance of the doctor to give anti-infective as well as rehydration therapy. 3, intestinal collapse, babies suddenly spit up, accompanied by paroxysmal crying, abdominal distension, should immediately go to the hospital for abdominal ultrasound to clearly diagnose, give air enema treatment to ease. 4, intracranial infection, babies suddenly vomit jet-like, with The baby suddenly vomited, accompanied by paroxysmal crying, abdominal distension, should immediately go to the hospital for abdominal ultrasound to clarify the diagnosis, give air enema treatment to relieve. 4, intracranial infection, the baby suddenly vomited jet, accompanied by fever, poor mental state, to pay attention to the intracranial infection, should immediately go to the regular hospital to check to clarify the diagnosis. In short, the baby appeared serious vomiting, should immediately go to the hospital after examination and treatment, so as not to delay the condition.