As newborns are not well developed in all systems, they will have such and such problems in their normal life, which makes parents very worried. First of all, we need to understand whether the baby’s problem is physiological or pathological. If the baby is in good spirits, can eat and sleep, normal stools, no nasal congestion, runny nose, cough and other cold symptoms, sounding phlegm in the throat, it may be neonatal laryngeal wheezing, is due to the laryngeal cartilage is not well developed, when breathing or eating milk will hear a sound like phlegm, this is normal, newborns this phenomenon is most obvious in one to two months, six months later, will gradually disappear, it is recommended It is recommended that babies take vitamin D orally regularly after birth. Babies sometimes have milk in their mouths without swallowing or have gastroesophageal reflux of milk which may also cause a sound like phlegm in the baby’s throat, usually without coughing, fever and other respiratory tract infection symptoms, and does not affect the mental state and milk eating. If the baby is accompanied by other cold symptoms, such as nasal congestion, cough, etc., it may be caused by a cold cold, the following measures can be taken: 1, keep warm: because newborns are more likely to catch a cold caused by bronchitis, bronchitis, etc., so parents should give attention to the newborn baby to keep warm, to prevent colds, but also can not be wrapped too tightly. 2, drink water: appropriate feeding baby warm boiled water, the throat has a good moistening effect, more water can make the sticky phlegm can be diluted, easy to discharge. 3.Patting the back: parents can let the baby lie on its side and gently pat the back with hollow palms from bottom to top and from outside to inside, 2-3 times a day for 3-5 minutes each time, which can promote the discharge of phlegm in the bronchus of the child. 4.Indoor ventilation, maintain humidity: open the windows regularly for ventilation, keep the indoor air fresh, preferably keep the room temperature at 18-22℃ and the relative humidity at 55%-65%, which can keep the respiratory mucosa moist and help the expulsion of phlegm. 5, the application of drugs: newborns should be very careful with drugs, can be used under the guidance of a doctor. 6, newborn days are relatively small, the condition is easy to progress, once the baby appears fever, poor spirit, cough obvious, poor feeding or persist for 2-3 days symptoms do not ease and so on need to promptly take the baby to the hospital to avoid delaying the condition.