Newborns with a growling throat like phlegm can be seen in congenital laryngeal stridor, respiratory tract infections, the treatment needs to be decided according to the cause, if necessary, need to comply with the doctor’s instructions for medication. 1. Congenital laryngeal stridor: also known as laryngeal cartilage chondromalacia, the clinical manifestation is often intermittent inspiratory laryngeal stridor, described by the parents as “always growling like phlegm”, which is obvious after activities or when breastfeeding. It is secondary to vibration of the tissues surrounding the epiglottis. Treatment involves strengthening daily care and feeding, such as avoiding choking, as well as vitamin D and calcium supplements, and the symptoms may disappear with age. Breastfeeding also requires attention to the mother’s vitamin D and calcium supplements. For extremely severe and even life-threatening airway obstruction, surgery may be necessary. 2. Respiratory tract infections: For example, neonatal infectious pneumonia, the above symptoms may appear, accompanied by spitting, nasal fluttering, etc. Early lung signs may not be obvious, and during the course of the disease, there may be double lungs with fine wet rales. Treatment should pay attention to the management of the respiratory tract, such as regular turning over and patting the back, timely suction of nasal and oral secretions, and oxygen therapy when there is hypoxia. These medications should be used under the supervision of a physician, and it is recommended that the patient be seen by a specialist for evaluation and intervention.