Five-month-old baby treatment is mainly to supportive therapy and drug therapy, may be related to upper respiratory tract infection, allergic rhinitis and other factors, need to target the cause of the treatment. 1. Upper respiratory tract infection: five months baby can be manifested as runny nose, cough or accompanied by fever and other symptoms. Upper respiratory tract infections are mostly caused by viruses, and generally do not require special treatment with antiviral drugs. If the combination of bacterial infection, if necessary, should follow the medical use of cefixime, amoxicillin and other antibacterial drugs; if the influenza virus caused by the application of oseltamivir and other antiviral drugs. 3. Allergy: If the baby has allergic rhinitis in addition to try to avoid contact with allergens, if necessary, you also need to pay attention to take the relevant allergy medication, such as loratadine, cetirizine and so on. The baby’s runny nose does not relieve the need to consult a doctor to clarify the diagnosis, follow the doctor’s instructions for targeted treatment. The above drugs need to be used under the guidance of a doctor, not self-medication.