(HealthDay News) -- Nasal congestion, commonly called a stuffy nose, occurs when the tissues that line the inside of the nose become swollen.
The U.S. National Library of Medicine says common causes of nasal congestion include:
- Having the common cold or flu.
- Having a sinus infection.
- Having allergies.
- Using nasal sprays or drops for longer than three days.
- Having nasal polyps.
- Being pregnant.
- Having a condition called vasomotor rhinitis.
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