A one-year-old baby with a cough, if there is phlegm, can take cough and phlegm medicines, mainly Mucosolvan. Other cough syrups are Xylocaine and Etanercept, which are very diverse and should be used under the guidance of a doctor. In addition, cough with phlegm can be nebulized. When nebulized, the medicine acts more directly on the airway and the effect will be more obvious. After nebulization, if there is phlegm in the baby’s throat, you should pat the baby’s back more often to promote coughing up the phlegm. Usually, you should also give your baby more warm boiled water to promote the expulsion of phlegm. If the cough with phlegm is accompanied by shortness of breath and cyanosis around the mouth, you need to be alert that pneumonia has occurred and intravenous fluids should be administered under the guidance of a doctor. The above is for reference only. Please follow the doctor’s guidance for specific medication and treatment in an interview.