Baby spit up milk from the nose, observe whether the milk choked into the trachea, if into the trachea, then it is more serious, to seek medical attention; if not, then it is not very important, do not have to worry too much. 1. If the baby appears blue, dyspnea, frequent coughing and other symptoms, it means that the milk flows into the lower respiratory tract, we should take the baby to the hospital in time for examination, and clean up the respiratory tract, to avoid choking, or cause secondary infection, resulting in bronchitis, pneumonia and other conditions. 2. If there is no such situation, the milk is just flowing out of the nose, usually there will not be too big a problem, parents can mainly clean up the nasal cavity. Usually parents should strengthen the care, adjust the feeding mode, such as moderate feeding, after drinking milk, try to burp, to reduce the choking situation.