The presence of sputum and cough in children is common after bacterial infection or viral or mycoplasma infection, causing bronchitis, pneumonia and other respiratory tract infections, and the specific drug treatment is as follows: 1. Expectorants and cough suppressants, such as nebulized acetylcysteine, and ipratropium bromide for reducing secretions, can be used in the treatment. In addition, oral expectorants, such as aminoglutethimide or Chinese patent medicines with expectorant and cough-suppressing functions, can be used. 2. Age factors, such as small infants or older children, should be taken into consideration in the treatment, and the corresponding evidence-based treatment should be carried out when choosing Chinese patent medicines in conjunction with the condition itself. If the cough is yellow phlegm or phlegm-rich, you can choose a medicine to clear lung heat and expectorant, such as compound fresh bamboo liquid or orange and shellfish combination. If the phlegm is clear and thin, it is most likely due to viral bronchitis, so expectorants for lung yin deficiency can be given to stop the cough.