Newborns coughing on breast milk can be seen in physiological phenomena, pathological conditions (such as bronchopneumonia, etc.), physiological phenomena are normal, pathological conditions lead to abnormal. 1. Physiological phenomenon: for this age group of babies, due to the immaturity of the development of various functions, in the process of breastfeeding, such as feeding faster, more rapid, or in the crying when feeding, can occur due to choking symptoms of coughing, usually pay attention to the way of feeding to reduce choking occurs, the cough can be relieved, and the baby does not have any other abnormalities and discomfort, is generally regarded as normal. 2. Pathology: (1) bronchopneumonia: this kind of children may have moaning and spitting symptoms during the course of the disease, and the process of breastfeeding is prone to choking and coughing, which can aggravate the lung infection, double lung examination and perfect chest X-ray can help to assist in the diagnosis, and if the cause is considered to be the cause is considered to be abnormal. (2) Oral gastrointestinal malformation: if there is soft palate cleft, esophageal tracheal fistula, may appear in the process of breastfeeding due to frequent choking and coughing symptoms, physical examination and improve the gastrointestinal tract imaging and other tests to help assist in the diagnosis of this case is not normal. Newborns coughing frequently, it is recommended to consult a specialist physician comprehensive assessment to determine a clear diagnosis, timely and targeted treatment, so as not to miss the opportunity for treatment.