Half a year old baby cough with phlegm, mainly due to the body of viruses, bacteria and other pathogens invasion, and make the respiratory mucosa inflammatory reaction caused. This time to pay attention to keep warm, avoid cold, continue breastfeeding. Breast milk contains natural antibacterial factors and rich immunoglobulin, which can enhance the baby’s immunity, and has a very good effect on resisting pathogens. If the baby’s symptoms are relatively serious, you can choose budesonide nebulized liquid nebulized inhalation treatment to relieve the symptoms. Appropriate feeding of proprietary Chinese medicines, such as orange red phlegm cough liquid, pediatric antisensory granules, Chuanbei loquat paste and so on. Blood test and other related examinations can be tested to clarify the cause of the disease and anti-pathogen treatment. For example, anti-viral can choose ribavirin, oseltamivir, etc.; anti-bacterial can choose penicillins, cephalosporins and other drugs.