A newborn’s shortness of breath when sucking milk may be due to physiological reaction, neonatal pneumonia and other reasons. 1. Physiological reaction: because the newborn baby in sucking milk, will be very hard to effectively suck out the milk, and too much force will lead to the respiratory rate, heart rate acceleration of the situation, with the adults after strenuous exercise respiratory heart rate acceleration. For this condition, the child will regain a better state of mind after breastfeeding, and the breathing will gradually stabilize, usually do not need to worry too much. 2. Neonatal Pneumonia: If you are suffering from neonatal pneumonia, your child will not only have shortness of breath during breastfeeding, but also after breastfeeding stops, the shortness of breath does not improve significantly, it is recommended that you take your child to a regular hospital for examination, and promptly carry out anti-infective and phlegm treatment. Shortness of breath during breastfeeding may also be related to other causes, and it is recommended to consult a specialist to evaluate the condition and standardize the treatment.