What does it mean when a child coughs up yellow phlegm?

Pediatric cough with yellow phlegm may be caused by respiratory tract infections, which usually lead to bronchitis and tracheitis. As the disease progresses, damage to the airway mucosa may occur, potentially leading to secondary bacterial infection and inflammation. For pediatric cough with yellow phlegm caused by respiratory tract infections, oral administration of Cefixime granules or Azithromycin dry suspension can be considered. However, it should be noted that Cefixime granules are suitable only for infants older than 6 months.