If a three-year-old baby suffers from bronchitis, comprehensive treatment is better to cure it. The treatment of bronchitis includes medication and nebulized inhalation therapy. When the symptoms of bronchitis patients are heavy, it is recommended to give the child the method of intravenous infusion of medicine, commonly used drugs are ceftriaxone sodium or ceftazidime injection, supplemented by phlegm fever clear injection, children with cephalosporin allergy can use azithromycin injection. Children with milder symptoms can be treated with oral administration, commonly used drugs are cefixime granules or azithromycin granules, combined with proprietary Chinese medicine with the effect of clearing heat, resolving phlegm and relieving cough, commonly used are pediatric lung fever and cough granules or pediatric cough and wheeze granules. For children with severe cough and phlegm, nebulized inhalation therapy is combined with the commonly used nebulized inhalation drugs, such as budesonide and terbutaline. It is also important to keep the air convection in the room, drink plenty of water, eat a light diet, and observe the changes in the condition at all times.