The causes of coughing in newborns are due to normal physiological reactions, such as dry mouth, choking on milk, etc., but may also be due to upper respiratory tract infections, pneumonia and other pathological factors. 1. Normal physiological reaction: it may be due to dry mouth or dry weather, choking while eating milk and so on causing newborns to cough. In this case, the cough is mostly an occasional cough or a few coughs, and there are no abnormal changes in the newborn’s mental state, feeding, sleeping, etc., and there is no fever, nasal congestion, runny nose, crying and so on. 2. Pathologic factors: (1) Upper respiratory tract infection: most neonatal upper respiratory tract infections are caused by viral infections, manifested by neonatal cough, fever, nasal congestion, runny nose, sneezing and other symptoms. (2) Pneumonia: it is a common disease in newborns, mainly caused by bacterial and viral infections, and clinically characterized by frequent coughing, dry cough, coughing up sputum, shortness of breath with fever and other symptoms. In addition, there are many other causes of cough in newborns, such as gastroesophageal reflux. If the newborn cough symptoms can not be relieved, it is recommended that parents should take the newborn to the hospital pediatrics to clarify the cause of the disease, if necessary, follow the doctor’s instructions for treatment.