If a 6-month-old baby sneezes and has a runny nose, if it is an acute attack, it is usually considered to be an acute upper respiratory tract infection caused by a respiratory virus infection. The main treatment is symptomatic, you can buy saline nasal spray to cleanse nasal secretions, you can also give the child a topical ribavirin spray or interferon spray, local spray throat, nasal antiviral treatment. If the disease is more obvious, you can also take Chinese medicine type anti-viral drugs at the same time, such as anti-viral oral solution. If your baby has sneezing and runny nose for a long time and has frequent recurrent attacks, you should also consider the possibility of allergic rhinitis and sinusitis secondary to viral or bacterial infections, and you should take anti-allergy medications such as cetirizine hydrochloride drops or loratadine syrup along with the above treatment. Antibiotics, such as cefaclor, are also needed if there is a basis for bacterial infection.