Breastfeeding or artificial feeding, many babies will have phlegm sound in the throat when drinking milk, there are two main cases: First, physiological phlegm sound, the younger the baby, the laryngeal cartilage development is not perfect, milk swallowing will be accompanied by vibration, which will produce a similar phlegm sound, the baby in 3-6 months after the symptoms will gradually disappear; Second, pathologic phlegm, the baby’s throat has a phlegm sound when drinking milk, pay attention to the presence of respiratory infections, in addition to the phlegm sound when drinking milk, also accompanied by cough, nasal congestion, poor mental state, fear of cold or fear of heat and so on. Drinking milk phlegm sound, but also accompanied by cough, nasal congestion, poor mental state, fear of cold or fear of heat and so on, if necessary, seek medical treatment. The mother’s calcium supplementation during pregnancy is too little to cause fetal calcium deficiency, resulting in congenital laryngeal cartilage chondromalacia, in addition to the obvious phlegm sound when drinking milk is also prone to choking, serious cases can lead to aspiration pneumonia, bronchitis, parents need to be timely after breastfeeding to the baby pat the back to alleviate.