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Nashville, TN
A 33-year-old female asked:

My 3.5yr old son has had a cold for about a week or so. and now when he blows his nose, yellow snot comes out. what is going on?

2 doctor answers3 doctors weighed in
Dr. Nayla Mumneh
Allergy and Immunology 30 years experience
Yellow mucus: Take him to the pediatrician make sure he does not have an ear infection.
Dr. Oscar Novick
Pediatrics 59 years experience
Cold: As noted your child has a cold. As the cold progresses the clear mucus begins to turn yellow because of the white blood cells that attack the mucus.
Last updated Dec 24, 2013

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