Children with phlegm in the throat are considered to be caused by colds, rhinitis, bronchitis, and are often treated with medication. 1. Colds and flu: Colds and flu can be caused by cold or decreased immunity, manifesting as cough, fever, coughing up phlegm, etc. Medications such as pediatric aminophenol xanthanamine granules and pediatric cold granules can be used to improve the symptoms of phlegm in the throat. 2. Rhinitis: The mucous membrane of the nasal cavity in patients with rhinitis will secrete some mucous substances, and the secretion may flow from the nasal cavity to the throat, making people feel that there is phlegm in the throat. Salt water can be used to wash the nasal cavity to dilute the secretion in the nasal cavity and improve the situation of phlegm in the throat. 3. Bronchitis: Inflammation of the bronchial tubes due to infection by germs can lead to phlegm in the throat and coughing. Ambroxol hydrochloride can be used to help get rid of phlegm in the throat, and if the condition is more serious, glucocorticosteroids, such as budesonide, can be inhaled by nebulization to help expel phlegm. All of the above medications should be used under a doctor’s supervision, and avoid self-medication. There are many other causes of phlegm in the throat in children, and it is recommended to actively seek medical attention and be evaluated and treated by a specialist.