Definition
By Mayo Clinic staffNasal congestion or "stuffy nose" occurs when nasal tissues and blood vessels become swollen with excess fluid, causing a "stuffy" feeling. Nasal congestion can be caused by a cold, influenza, allergies to such things as dust, pollen or pet dander, or as a response to irritants such as tobacco smoke. Some people have a chronically congested nose for no apparent reason — a condition known as nonallergic rhinitis. Nasal congestion may or may not be accompanied by a nasal discharge or "runny nose."
Nasal congestion usually is just an annoyance for older children and adults. But nasal congestion can be serious in infants, who might have a hard time nursing or breathing as a result.
- Nasal congestion and rhinorrhea. The Merck Manuals Online: Merck Professional Edition. http://www.merckusa.com/mmpe/print/sec08/ch089/ch089c.html. Accessed June 24, 2010.
- Snoring and nasal congestion. American Rhinologic Society. http://www.american-rhinologic.org/patientinfo.snoring.phtml. Accessed June 24, 2010.
- Stuffy nose. American Academy of Otolaryngology — Head and Neck Surgery. http://www.entnet.org/HealthInformation/stuffyNose.cfm. Accessed June 24, 2010.

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