The phlegmization of 1-3 years old babies can be treated with medication and phlegm patting care method according to the cause of the disease. If the symptoms of phlegm in babies are caused by bacterial infection, you can use some antibacterial drugs, such as cefazoxime, cefoperazone, etc. If the excessive phlegm affects sleep and play, you can use some phlegm-modifying drugs for nebulized inhalation, such as acetylcysteine, aminoglutethimide hydrochloride and so on. Note that drugs should be used under the guidance of a doctor. In addition, you can use the palm of your hand to arch into an arch, and pat your back from the bottom up appropriately, which can promote the expulsion of phlegm from the baby through mechanical vibration. At the same time, you can drink more water to moisten the airway and promote the dilution of phlegm and the discharge of phlegm.