If a newborn suddenly does not eat much milk, the following reasons are mainly considered: 1, gastrointestinal dysfunction, in addition to the symptoms of suddenly not eating milk, often accompanied by bloating, abdominal pain, undigested food in the stool or milk flaps, etc., you can take probiotics in time, such as small Pepcid, Mamma Love, etc., these probiotics can effectively regulate intestinal flora disorders, thus helping the recovery of gastrointestinal dysfunction and 2, other diseases, this situation is also very common, for example, in addition to not eating milk, accompanied by nasal congestion, runny nose, cough, mainly due to respiratory infections. After the respiratory infection is controlled, the situation of milk eating will be significantly improved; 3, anorexia, the reason for not eating milk is caused by anorexia, generally related to the lack of trace elements, such as zinc, can be timely zinc supplementation treatment.