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Nasal polyps

Definition

Nasal polyps are soft, sac-like growths on the lining of the nose or sinuses.

Causes

Nasal polyps can grow anywhere on the lining of the nose or the sinuses. They often grow where the sinuses open into the nasal cavity. Small polyps may not cause any problems. Large polyps can block your sinuses or nasal airway.

Nasal polyps are not cancer. They seem to grow due to long-term swelling and inflammation in the nose from allergies, asthma, or infection.

No one knows exactly why some people get nasal polyps. If you have any of the following conditions, you may be more likely to get nasal polyps:

  • Aspirin sensitivity
  • Long-term (chronic) sinus infections

    • Symptoms

    If you have small polyps, you may not have any symptoms. If polyps block nasal passages, a can develop.

    Symptoms include:

  • Runny nose
  • Sneezing
  • Feeling like your
  • Loss of smell
  • Loss of taste
  • Headache and pain if you also have a sinus infection
  • Snoring

    • With polyps, you may feel like you always have a head cold.

    Exams and Tests

    Your health care provider will look in your nose. They may need to perform nasal endoscopy to see the full extent of the polyps. Polyps look like a grayish grape-shaped growth in the nasal cavity.

    You may have a of your sinuses. Polyps will appear as cloudy spots. Older polyps may have broken down some of the bone inside your sinuses.

    Treatment

    Medicines help relieve symptoms, but rarely get rid of nasal polyps.

  • Nasal steroid sprays can sometimes shrink polyps. They help clear blocked nasal passages and runny nose. Symptoms return if treatment is stopped.
  • Corticosteroid pills or liquid may also shrink polyps, and can reduce swelling and nasal congestion. The effect lasts a few months in most cases.
  • Allergy medicines can help prevent polyps from growing back.
  • Antibiotics can treat a sinus infection caused by bacteria. They can't treat polyps or sinus infections caused by a virus.

    • If medicines don't work, or you have very large polyps, you may need surgery to remove them.

  • Endoscopic sinus surgery is often used to treat polyps. With this procedure, your surgeon uses a thin, lighted tube with instruments at the end. The tube is inserted into your nasal passages and your surgeon removes the polyps.
  • Usually you can go home the same day.
  • Sometimes polyps come back, even after surgery.

    • Outlook (Prognosis)

    Removing polyps with surgery often makes it easier to breathe through your nose. Over time, however, nasal polyps often return.

    Loss of smell or taste does not always improve following treatment with medicine or surgery.

    Possible Complications

    Complications may include:

  • Bleeding
  • Infection
  • Polyps coming back after treatment

    • When to Contact a Medical Professional

    Contact your provider if you often find it hard to breathe through your nose.

    Prevention

    You can't prevent nasal polyps. However, nasal sprays, antihistamines, and allergy shots may help prevent polyps that block your airway. Newer treatments such as injection therapy with anti-IGE antibodies may help prevent polyps from coming back. 

    Treating sinus infections right away also may help.

    References

    Bachert C, Zhang N, Gevaert P. Rhinosinusitis and nasal polyps. In: Burks AW, Holgate ST, O'Hehir RE, et al. eds. Middleton's Allergy: Principles and Practice. 9th ed. Philadelphia, PA: Elsevier; 2020:chap 41.

    Beswick DM, Soler ZM, Hopkins C, Smith TL. Chronic rhinosinusitis: outcomes of medical and surgical treatment. In: Flint PW, Francis HW, Haughey BH, et al, eds. Cummings Otolaryngology: Head and Neck Surgery. 7th ed. Philadelphia, PA: Elsevier; 2021:chap 43.

    Chi DH, Tobey A. Otolaryngology. In: Zitelli BJ, McIntire SC, Nowalk AJ, Garrison J, eds. Zitelli and Davis' Atlas of Pediatric Physical Diagnosis. 8th ed. Philadelphia, PA: Elsevier; 2023:chap 24.

    Haddad J, Dodhia SN. Nasal polyps. In: Kliegman RM, St. Geme JW, Blum NJ, Shah SS, Tasker RC, Wilson KM, eds. Nelson Textbook of Pediatrics. 21st ed. Philadelphia, PA: Elsevier; 2020:chap 406.

    Murr AH, Pletcher SD. Approach to the patient with nose, sinus, and ear disorders. In: Goldman L, Cooney KA, eds. Goldman-Cecil Medicine. 27th ed. Philadelphia, PA: Elsevier; 2024:chap 394.

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    Contact Atlanta Obsetrics and Gynaecology at The Womens Center Millennium Hospital - 404-ATL-BABY

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    Review Date: 9/10/2023

    Reviewed By: Josef Shargorodsky, MD, MPH, Johns Hopkins University School of Medicine, Baltimore, MD. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.