Babies wheezing coarsely at breastfeeding may be eating milk too quickly, having secretions blocking the nasal cavity, suffering from upper respiratory tract infections, etc. 1. It may be that the baby is too eager or too fast in breastfeeding, especially when the baby is hungry, resulting in rough breathing. 2. There may also be nasal secretions that block the nasal passages, making it difficult to breathe, and thus causing stridor. 3. There may also be respiratory infections caused by colds, bronchitis, etc., resulting in stridor. Babies should be observed when they are breastfeeding. If the symptoms disappear after breastfeeding and there is no other discomfort, they can be observed for the time being. If it is only recently appeared such a situation, to see whether the nasal passages are clear, there are no symptoms of runny nose, sneezing, if there is, we should consult a doctor in time, give intervention treatment.