Why Is Sinus Fluid Yellow? Understanding the Causes and Symptoms

Discover why sinus fluid turns yellow and what it indicates about your health, including infection and immune response.

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Yellow sinus fluid indicates the presence of white blood cells fighting off an infection, often a cold or sinusitis. When your body is combating pathogens, these cells produce a substance called myeloperoxidase, which gives the mucus its yellow hue.

FAQs & Answers

  1. What causes sinus fluid to turn yellow? Yellow sinus fluid is caused by white blood cells producing myeloperoxidase while fighting off an infection such as a cold or sinusitis.
  2. Is yellow mucus a sign of a sinus infection? Yes, yellow mucus often indicates that your body is fighting a bacterial or viral infection, commonly associated with sinusitis.
  3. When should I see a doctor for yellow sinus fluid? If yellow sinus fluid persists for more than 10 days, is accompanied by severe pain, fever, or swelling, you should consult a healthcare professional.

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