For newborns with phlegm-like sound in the nasal cavity, parents can use the following methods to deal with it: first, apply nasal aspirator to aspirate the nasal cavity, because the child’s nasal cavity has more nasal secretions after the cold, and there is phlegm-like stuff in the nasal cavity, parents can use the negative pressure of the nasal aspirator to effectively suck out the secretions in the nasal cavity, and the abnormal nasal sound will disappear. Secondly, you can apply physiological sea saline to clean the child’s nasal cavity because physiological sea saline has very little irritation to the nasal cavity and will not cause damage to the nasal mucosa due to improper operation with the nasal aspirator. Therefore, parents of newborns with phlegm sounds in the nasal cavity can use a nasal aspirator or physiological sea saline to clean the nasal cavity.