If the baby is not accompanied by other uncomfortable symptoms, spitting up milk from the nose and mouth, usually nothing. If spitting up is frequent, you need to be alert to gastroesophageal reflux, bronchopneumonia, acute gastroenteritis and other diseases. Spitting up is a phenomenon in which part of the milk or food returns from the stomach to the mouth shortly after the baby is fed. As the baby’s cardia is not yet well developed, his/her stomach capacity is small and in a horizontal position, spitting up will occur. If the occasional spit up from the nose and mouth spray out, and the baby’s weight gain is good, there is no symptom of discomfort, mostly belong to the physiological spit up, generally can be treated with burping after eating milk. But if the baby has fever, diarrhea, frequent spitting up, choking, spitting, shortness of breath, purple lips, decreased appetite and other abnormalities, need to be alert to the possibility of bronchopneumonia, such as the recent history of unclean diet, need to be alert to the possibility of acute gastroenteritis. Parents should bring their babies to regular hospitals for relevant examinations to clarify the cause of the disease. And cooperate with the doctor to take relevant treatment measures.