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15 Causes of a Runny Nose
Medically reviewed by Shilpa Amin, M.D., CAQ, FAAFP, Family Medicine, Women's Health, Geriatrics, Integrative Medicine, Clinical Research, Jurisprudence, — Written by Valencia Higuera on March 20, 2019
A runny nose is a symptom of many conditions.
It’s characterized by mucus draining or dripping from the nostril.
Runny nose like water
Mucus is a protective substance produced by the mucous membrane, a type of tissue lining the nasal cavity. Mucus moistens the air you breathe, and it acts as a barrier to keep dust, pollen, and bacteria out of your lungs.
Your nose produces mucus every day, yet you probably don’t notice because it mixes with saliva and drips down the back of your throat.
Sometimes, irritation or inflammation in the nasal passage can lead to increased mucus production.
When this happens, excess mucus can drain or drip from the nose.
Here’s a look at 15 common causes of a runny nose.
Indoor and outdoor allergies can trigger an allergic response.
Allergens include:
- dust
- pollen
- ragweed
- pet dander
Allergens cause symptoms s
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