Phlegm in the throat of 1-year-old babies is mostly caused by diseases of the respiratory system, mostly seen in upper respiratory tract infections, bronchitis, bronchiectasis or pneumonia. If the baby has a runny nose, nasal congestion, no fever and good mental state, it is recommended to give the baby 3-5 days of pediatric cold medicine, commonly used are pediatric black beetle and clear fever granules. If the baby is accompanied by nighttime paroxysmal cough, phlegm, as manifested by the throat inside the whirring sound, this situation is recommended to take oral anti-fever and antiviral drugs plus antibiotics. If the baby has a fever, temperature repeatedly exceeds 38.5°C, and the nighttime paroxysmal cough is heavy, it is recommended to go to the pediatric internal medicine department for a face-to-face consultation, which requires routine blood tests and a chest X-ray to rule out pneumonia. If the diagnosis is clearly pneumonia, it is recommended to treat better with infusion.