Cough with phlegm in children is mostly seen in respiratory tract infections, how to stop cough and resolve phlegm need to be decided in conjunction with the condition, such as the condition is mild, can be treated with drugs such as aminoglutethimide oral solution, at the same time suspected of bacterial infections caused by the application of antibiotic treatment is required. Cough with phlegm in children is mostly seen in respiratory tract infections, such as acute bronchitis, bronchopneumonia, affected by pathogenesis (e.g. viruses or bacteria, etc.), there can be bronchial or alveolar involvement, which stimulates the production of respiratory secretions, cough and phlegm, and some of them can be accompanied by fever, wheezing, and so on. Treatment of cough and expectoration should be based on the severity of the disease and the pathogenesis of the infection. If the cough and sputum symptoms are mild, the symptoms can be treated with oral medication such as Ambroterol Oral Liquid or Pulmonary Cough Compound; if the disease is severe, nebulization with inhaled glucocorticosteroids (e.g., budesonide) is required, and daily breathing should be strengthened, and patting of the back can be carried out after the nebulization. If there is a suspicion of combined bacterial (or Mycoplasma pneumoniae) infection, sensitive antibiotics such as cefaclor and azithromycin should be used for anti-infection treatment. All of the above medications should be used under the guidance of a physician, and it is recommended to actively consult a specialist to evaluate the specific cause of the disease and the treatment plan.