Babies suddenly spit up a lot of milk, may be related to indigestion, intestinal infection, high intracranial pressure and so on. 1. Indigestion: it may be that the baby’s digestive system is not perfect, when eating too much, can not be well digested, easy to spit up a lot of milk. 2. Intestinal infection: it may be that the baby’s breastfeeding tableware or milk powder is contaminated, causing intestinal infections, gastrointestinal discomfort, which can also lead to a lot of spit up 3. high intracranial pressure: after eating the milk powder appeared projectile vomiting, may be intracranial infection, intracranial occupation and so on intracranial pressure increased, resulting in spitting up. The baby suddenly spit up a lot of milk, there may be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.