Newborn babies may have a transient phenomenon of rattling in the throat. If the sound of phlegm ringing in the throat is light, infrequent, and disappears immediately after removing secretions, it may be a transient phlegm ringing and can be observed first.
However, if there is repeated phlegm sound in the throat, more obvious when moving, sucking and crying, or even the phenomenon of needing to stop and rest several times to eat milk, it may indicate congenital laryngeal wheezing or other laryngeal abnormalities, and it is recommended to go to the hospital to ask the doctor for examination and judgment.