If your mucus is white and thicker
You’re getting sick, or are already there. You probably feel congested and are blowing your nose more often than normal. “Our immune system produces more white blood cells to fight the incoming infection, causing the mucus to thicken and turn white,” says Dr. Iloreta. When you’re sick, your nose tissue is swollen and inflamed, which slows the flow of mucus and makes you feel stuffy.
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