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Looking to avoid getting the flu? Our free guide has everything you need to stay healthy this season. Sign up and get yours today. Don't judge your mucus by its color. Updated June 22, Centers for Disease Control and Prevention. Antibiotic prescribing and use in doctor's offices: Sinus infection sinusitis.
Updated August 27, Cleveland Clinic. What the color of your snot really means: decoding the various possible hues. Updated January 14, The skinny on snot: What your child's mucus says about their health. Published November 15, Your Privacy Rights. To change or withdraw your consent choices for VerywellHealth. At any time, you can update your settings through the "EU Privacy" link at the bottom of any page. These choices will be signaled globally to our partners and will not affect browsing data.
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Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy. Related Articles. Can Allergies Cause Tinnitus? Nasal Polyps in Children. Why Do Sinus Infections Happen? How a Sinus Infection Is Diagnosed. What Is Mucus? Why You Cough. Get Sinus Infection Relief. In the case of a bacterial infection, the bacteria become trapped and breed in pre-existing mucus, which turns yellow-green as the white blood cells go to work.
During a viral infection, such as the common cold or flu, the first and last stage of the infection cause the production of clear, thin mucus in the nose and back of the throat. As the immune system begins to attack the infection, the mucus thickens and may turn yellow or green.
Bacterial infections can be fought with antibiotics, but viral infections cannot.
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