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Yellow nasal mucus indicates that the body is fighting an infection. The yellow color comes from the cells — white blood cells, for example — rushing to kill the offending germs.
Dead cells, germs, tobacco smoke and other substances in your mucus can change its color. Mucus colors include: White, cream-colored or light yellow. When your mucus gets dense and appears white or creamy, it usually means you’re fighting a cold or other viral infection.
Mucus can turn different colors for a variety of reasons. White snot can occur with a cold, for example, and pink boogers can be a sign of pregnancy. Often times green or yellow mucus indicates an infection. Yellow or clear mucus can also be a sign of allergies.
Does coughing up yellow mucus or other mucus colors mean you’re sick? Is it a symptom of COVID-19? Learn what yellow snot color means and when to see a doctor.
Clear snot is in the normal range, while white mucus can mean you’re congested and yellow or green mucus can sometimes mean that you have an infection.
If you see green or yellow phlegm, it’s usually a sign that your body is fighting an infection such as pneumonia. The color comes from white blood cells. At first, you may notice yellow phlegm...
During a common cold, nasal mucus may start out watery and clear, then become progressively thicker and more opaque, taking on a yellow or green tinge. This coloration is likely due to an increase in the number of certain immune system cells, or an increase in the enzymes these cells produce.