What medicine should children take for phlegm in their lungs?

Patient's question:

Patient Gender: Wang Yifei
Detailed Condition and Purpose of Consultation: Seems like there's always phlegm in his lungs.
Duration of Current Illness: Seems like it's been there since birth.
Current General Condition: Sometimes it can be heard.

Doctor's answer:

Most coughs are caused by inflammation due to upper respiratory infections. It is advisable to use some antibacterial and anti-inflammatory medications in combination with a mucus thinner like for treatment. If the cough is severe, the baby can inhale steam; moist air helps clear mucus from the lungs and soothe coughs. It is best to drink plenty of water, and if there is inflammation, antibiotics should be added. For oral medications that are not effective, intravenous treatment is recommended. Use under the guidance of a local doctor. If there is phlegm, you can try oral fresh bamboo juice.