Cough and yellow nose in babies indicate bacterial infection in the upper respiratory system. The infection causes congestion and edema in the mucous membrane of the upper respiratory tract, and there is also a certain irritation and coughing symptoms. The mucous membrane will also secrete inflammatory substances, and neutrophils in the body will gather at the inflammation site and engulf foreign bacteria, these neutrophils will then shed and necrosis, and the shed mucous membrane epithelial cells and inflammatory exudate will mix together to form yellow nasal discharge, which needs to be treated with antibiotics. You can give your baby oral pediatric cefixime granules or pediatric cefadroxil granules. If there is no allergy to penicillin, the child can be given amoxicillin or amoxicillin clavulanate potassium for treatment. If the symptoms of cough are more serious, you also need to take cough and phlegm medicines at the same time. Lung Power Cough Combination is often effective in treating cough caused by bacterial infections, and compound Fresh Bamboo Liqueur or Amobutrol Oral Solution are also acceptable.