The main causes of nighttime vomiting in babies include indigestion and acute gastroenteritis, which require prompt medical treatment. If your baby eats too much food before going to sleep or if the food is too varied, it may lead to indigestion and then vomiting at night, in addition, if you eat ice cream and other cold foods, vomiting may also occur. The baby always in the night vomiting may also be related to bacterial or viral infections, if the baby does not pay attention to hand hygiene, contact with pathogens may lead to acute gastroenteritis, such as Coxsackie virus, pathogenic Escherichia coli, etc., the baby in addition to vomiting, and may even be accompanied by varying degrees of fever or diarrhea. Babies always vomit at night need prompt medical attention and active treatment.