Why Does Your Nose Run When You Get a Cold?

Dear Dr. Cory:

When we get a cold, why do our noses run?

Charlotte
Indiana

Dear Charlotte,

When you catch a cold virus, your body tries to get rid of it by making clear mucus. That way, viruses wash down your throat or out of your body when you blow your nose, sneeze, or cough.  After a few days the body’s white blood cells start fighting the cold and make the mucus turn white, yellow, or green. This is normal and does not mean that you need antibiotic (AN-ti-bi-OT-ic) medicine. Antibiotics only help illnesses caused by bacteria. Taking antibiotics when they are not needed can be harmful.

White, yellow, or green mucus is a sign that white blood cells are fighting a cold virus.

Cold-fighting Tip
Thick mucus plugs up the nose and sinuses. Drinking extra fluids with a cold helps to keep mucus thin.

Keep Yourself and Others Healthy

Throw away your tissues after you blow or wipe your nose and wash your hands! Both the tissues and your hands may be full of viruses! The more you wash your hands the less likely you will be sick.