Nasal polyps are soft, painless, noncancerous growths on the lining of your nasal passages or sinuses. They hang down like teardrops or grapes. They result from chronic inflammation due to asthma, recurring infection, allergies, drug sensitivity or certain immune disorders.
Small nasal polyps may not cause symptoms. Larger growths or groups of nasal polyps can block your nasal passages or lead to breathing problems, a lost sense of smell, and frequent infections.
Nasal polyps can affect anyone, but they're more common in adults. Medications can often shrink or eliminate nasal polyps, but surgery is sometimes needed to remove them. Even after successful treatment, nasal polyps often return.
March 08, 2014
- Nasal polyps. The Merck Manuals: The Merck Manual for Health Care Professionals. http://www.merckmanuals.com/professional/ear_nose_and_throat_disorders/nose_and_paranasal_sinus_disorders/nasal_polyps.html. Accessed Oct. 15, 2013.
- Kalish L, et al. Topical steroids for nasal polyps. Cochrane Database of Systematic Reviews. http://onlinelibrary.wiley.com/doi/10.1002/14651858.CD006549.pub2/abstract. Accessed Oct. 15, 2013.
- DeMarcantonio MA, et al. Nasal polyps: Pathogenesis and treatment implications. Otolaryngologic Clinics of North America. 2011;44:685.
- Diagnosis and treatment of respiratory illness in children and adults. Institute for Clinical Systems Improvement. https://www.icsi.org/guidelines__more/catalog_guidelines_and_more/catalog_guidelines/catalog_respiratory_guidelines/respiratory_illness/. Accessed Oct. 15, 2013.
- Aring AM, et al. Acute rhinosinusitis in adults. American Family Physician. 2011;83:1057.
- Adkinson NF, et al. Middleton's Allergy: Principles and Practice. 8th ed. Philadelphia, Pa.: Saunders Elsevier; 2014. https://www.clinicalkey.com. Accessed Oct. 15, 2013.
- Bhattacharyya N. Clinical presentation, diagnosis, and treatment of nasal obstruction. http://www.uptodate.com/home. Accessed Oct. 15, 2013.
- Naegleria fowleri. Centers for Disease Control and Prevention. http://www.cdc.gov/parasites/naegleria/. Accessed Oct. 15, 2013.