8-month-old baby spit up in the form of jets, the following possibilities are common: 1, central nervous system diseases, when there is meningitis, intracranial tumors, intracranial hemorrhage and other diseases, so that the intracranial pressure increases, thus appearing in the form of jets of vomiting, often accompanied by depressed mental state or restlessness, sometimes accompanied by convulsions and other symptoms, we must go to the hospital in a timely manner, to give the cranial CT and cerebrospinal fluid and other related tests to make clear that the condition is more dangerous. 2, digestive tract diseases, such as acute intestinal obstruction, acute gastroenteritis will be vomited, mostly gastric contents. Vomiting occurs in the case of gastrointestinal diseases, such as acute intestinal obstruction and acute gastroenteritis, sometimes in the form of jet, mostly gastric contents, and it is necessary to go to the hospital in time for relevant examinations, such as abdominal plain films.