Three-year-old babies with yellow nasal discharge, but with cough and phlegm, mostly due to upper respiratory tract infections, can cooperate with the doctor to choose antiviral drugs, antibiotics, cough and phlegm medicines and other ways to deal with. 1. Antiviral drugs: most of the upper respiratory tract infections are caused by viral invasion, so if you are sure of the viral infection, you can cooperate with the doctor to choose the antiviral drug treatment, such as Four Seasons Antiviral Combination. 2. Anti-bacterial drugs: the phenomenon of yellow nasal discharge may be combined with bacterial infection, at this time, with the doctor to choose cefixime, amoxicillin, azithromycin and other drugs to fight infection. 3. cough and phlegm medicine: three-year-old baby yellow sniffles, but there is a cough, phlegm symptoms, if necessary, can cooperate with the doctor to choose Ambrotyl oral solution and other drugs, so as to promote phlegm discharge. If the three-year-old baby running yellow nose, with a cough, phlegm, it is recommended to seek medical attention in a timely manner, under the guidance of the doctor to use medication, not blindly self-medication, in order to avoid danger.