Five-month-old baby nose with yellow snot, may be the existence of infectious rhinitis, respiratory tract infections, etc., need to give appropriate treatment according to the cause. 1. Infectious rhinitis: if the baby has infectious rhinitis and other problems, there will be the phenomenon of yellow snot, can be applied under the guidance of the doctor’s medication, for example, combined with bacterial infections can be applied to cefaclor extended-release tablets, with saline nasal wash and other treatments. 2. Respiratory infections: common is the cold, if the baby running yellow nose is mostly related to bacterial infections, you can take cefixime and other antibacterial drugs under the guidance of the doctor. If the baby’s situation is more serious, or other symptoms, such as fever, cough, etc., to go to the hospital in time to avoid delay.