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Definition
By Mayo Clinic staffRunny nose is excess drainage, which may range from a clear fluid to thick mucus, produced by the nasal and adjacent tissues and blood vessels in the nose. The drainage of runny nose may run out of your nose or down the back of your throat or both.
The terms "rhinorrhea" and "rhinitis" are often used interchangeably to refer to a runny nose. Strictly speaking, rhinorrhea refers to a thin, relatively clear nasal discharge. Rhinitis refers to inflammation of the nasal tissues from a number of causes, which usually results in a runny nose.
Nasal congestion may or may not accompany runny nose.
References
- Post-nasal drip. American Academy of Otolaryngology — Head and Neck Surgery. http://www.entnet.org/HealthInformation/postNasalDrip.cfm. Accessed Jan. 16, 2013.
- Nasal congestion and rhinorrhea. The Merck Manuals: The Merck Manual for Healthcare Professionals. http://www.merckusa.com/mmpe/print/sec08/ch089/ch089c.html. Accessed Jan. 16, 2013.
- Schroer B, et al. Nonallergic rhinitis: Common problem, chronic symptoms. Cleveland Clinic Journal of Medicine. 2012;79:285.
- LeBlond RF, ed., et al. DeGowin's Diagnostic Examination. 9th ed. New York, N.Y.: The McGraw-Hill Companies; 2009. http://www.accessmedicine.com/resourceTOC.aspx?resourceID=534. Accessed Jan. 20, 2013.
- Images in clinical medicine: Cerebrospinal fluid leak. New England Journal of Medicine. 2009;361:e26.
- Mandell GL, et al. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases. 7th ed. Philadelphia, Pa.: Churchill Livingstone Elsevier; 2010. http://www.mdconsult.com/books/about.do?about=true&eid=4-u1.0-B978-0-443-06839-3..X0001-X--TOP&isbn=978-0-443-06839-3&uniqId=230100505-57. Accessed Jan. 20, 2013.
- Kliegman RM, et al. Nelson Textbook of Pediatrics. 19th ed. Philadelphia, Pa.: Saunders Elsevier; 2011. http://www.mdconsult.com/das/book/body/208746819-6/0/1608/0.html. Accessed Jan. 20, 2013.
- Flint PW, et al. Cummings Otolaryngology: Head & Neck Surgery. 5th ed. Philadelphia, Pa.: Mosby Elsevier; 2010. http://www.mdconsult.com/books/about.do?about=true&eid=4-u1.0-B978-0-323-05283-2..X0001-8--TOP&isbn=978-0-323-05283-2&uniqId=230100505-57. Accessed Jan. 20, 2013.
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