What Are Nasal Polyps? Symptoms, Causes, Diagnosis, Treatment, and Prevention
Updated on August 8, 2025
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In simple terms, nasal polyps are unhealthy sinus tissue growths inside the nose, says Jean Kim, MD, PhD, an associate professor of otolaryngology at Johns Hopkins Medicine in Baltimore. “By ‘unhealthy,’ I mean full of inflammation — tissues and cells behaving badly,” Dr. Kim says.
Nasal polyps are a subgroup of chronic rhinosinusitis (CRS), which affects about 1 in 8 adults. CRS is characterized by inflammation of the nose and sinus cavities. About 20 percent of people with CRS have nasal polyps, which are benign growths in the nasal cavities that are thought to originate in the ethmoid sinuses (the hollow spaces in the bones around the nose).
These soft, painless, noncancerous growths develop in the lining of the nasal passages or sinuses; they typically form in clusters and hang down in the shape of a teardrop or tiny grape.
Signs and Symptoms of Nasal Polyps
The symptoms of nasal polyps can have a significant impact on quality of life, says Kim. “One of the most common symptoms is the sensation of congestion and nasal obstruction,” she says.
Other possible symptoms include:
- Runny nose
- Reduction in sense of smell or taste
- Postnasal drip
- Sleep disturbances
- Facial pain or headache
- Pain in the upper teeth
- Snoring
Causes and Risk Factors of Nasal Polyps
Prolonged inflammation of the lining of the nose and sinuses, also called CRS, is associated with nasal polyps, but it’s not completely clear what causes it, says Kim. “The membranes become inflamed, which can include swelling, redness, and fluid buildup. This can continue for a long time or happen over and over again,” she says.
Tissue samples taken from nasal polyps have led some experts to believe that allergies and infections cause the inflammation. Those samples contained extra eosinophils, which are white blood cells linked to infections and allergic reactions. The resulting inflammation causes small growths filled with fluid that eventually turn into polyps.
Genetics
There is some evidence that genetics may influence the likelihood that a person will develop nasal polyps, says Kim.
A study found that the prevalence of nasal polyps among relatives was nearly five times that of the control group, leading the authors to conclude the results “strongly indicate that heredity is important in the development of nasal polyps.”
The exact genetic component that may increase the risk of nasal polyps hasn’t been established, but it appears that it may involve the genes that play a role in the immune system and inflammatory response. One study noted that a specific single nucleotide polymorphism (a common type of genetic variation) seemed to be associated with an increased risk of nasal polyps.
Asthma and Allergies
“In the United States, the greatest risk factor is having a condition such as asthma, allergies, or eczema; those people will tend to be at greater risk for developing nasal polyps,” says Kim.
Other risk factors for nasal polyps include the following.
- Sensitivity to nonsteroidal anti-inflammatory drugs (NSAIDs) or aspirin
- Allergic fungal sinusitis
- Cystic fibrosis
- Churg Strauss syndrome
- Vitamin D deficiency
Exposure to Irritants
Textile workers who have been exposed to occupational dust, particularly those who have had long-term exposure, appear to have an increased prevalence of nasal polyps.
How Are Nasal Polyps Diagnosed?
After a complete health history and physical exam, your healthcare provider will examine your nose with an otoscope or a simple lighted tool. In some cases, they may be able to see your polyps, but not always. Your primary care doctor may be able to further explore what’s triggering the growth of your polyps through testing, or they may refer you to an otolaryngologist, also known as an ear, nose, and throat doctor (ENT), or an allergist.
Tests for nasal polyps can include the following:
- Nasal Endoscopy In this procedure, a long, flexible tube with a light on the end is inserted into your nose. This allows the doctor to have a comprehensive view of your inner nose and your sinuses.
- Computed Tomography (CT) Scan To aid in the full evaluation of the sinuses, a CT scan may be performed. For this diagnostic test, X-rays are used to create images of structures inside the body that can be analyzed by a radiologist with a computer.
- Magnetic Resonance Imaging (MRI) If needed, an MRI scan can help a doctor evaluate for any complications of polyps as well as rule out other conditions that can look like polyps. An MRI machine uses a magnetic field to make images of inner organs and other structures.
- Allergy Testing Allergies can contribute to the likelihood of nasal polyps.
Polyps typically occur in both nasal passages. Polyps that occur on only one side may indicate a benign or cancerous tumor, especially if there is also bloodstained nasal discharge. In that case, a polyp biopsy may be performed to rule out a cancerous growth.
Treatment and Medication Options for Nasal Polyps
Steroids, biologic drugs, and surgery are among the possible treatments for nasal polyps. In some cases, dietary supplements may relieve the symptoms caused by polyps, but be sure to clear it with your doctor before trying any new supplements.
Medication Options
Treatment for nasal polyps generally starts with drug therapy.
Nasal Corticosteroids If the polyps are very small, they may be treated with nasal steroids, says Kim. Nasal steroids may be in the form of sprays, drops, or an additive to nasal saline irrigations. Options include:
- fluticasone nasal (Flonase)
- budesonide nasal (Rhinocort)
- mometasone nasal (Nasonex)
- triamcinolone nasal (Nasacort)
- beclomethasone nasal (Qnasl)
- ciclesonide nasal (Omnaris)
Oral Steroids If the polyps are big or you have a large disease load, oral corticosteroids like prednisone (Deltasone) may be prescribed. “We try to avoid using these because they can have serious and potentially harmful side effects,” says Kim.
Injectable Corticosteroids Injectable steroids may be used if the polyp load is severe.
Biologic Drugs Monoclonal antibodies can be used to treat nasal polyps and can work well for some patients, says Kim. Three biologics have come onto the market since 2019: mepolizumab (Nucala), dupilumab (Dupixent), and omalizumab (Xolair). Biologic drugs are still relatively new medications, and their long-term effects are still unclear.
“Although these drugs can be expensive, they are a good option to try; they can potentially treat the polyps so that surgery is unnecessary,” Kim says.
Antihistamines or Antibiotics If allergies or chronic or recurrent infections appear to be causing swelling in your nasal passages or sinuses, your doctor may prescribe antihistamines or antibiotics to treat the underlying cause.
Aspirin Desensitization Some people with nasal polyps have aspirin sensitivity and may benefit from aspirin desensitization, in which very small doses of aspirin are administered and gradually increased as the person becomes able to tolerate them. This is usually done under the supervision of an allergy specialist.
Surgical Options
For people whose symptoms aren’t controlled by medication, surgery is an option. But surgery may not be a permanent solution: Rates of relapse and repeated intervention are high. The goal of surgery is not only polyp removal but also opening the sinuses to improve access for topical steroid therapies following surgery.
Endoscopic Surgery In endoscopic surgery, a small tube with a lighted magnifying lens or tiny camera is inserted into your nostrils so that the surgeon can access your sinus cavities and remove the polyps. It’s usually performed as an outpatient procedure.
In the most severe cases, both surgery and aggressive medical therapy, including biologics and delivery of steroids via nasal irrigation, may be necessary to treat the polyps, says Kim.
Alternative and Complementary Therapies
Some research has found that some supplements may minimize inflammation, which in turn can help with the symptoms of polyps. For example, one study that involved a randomized controlled trial found that supplementing with omega-3 fatty acids (fish oil) helped delay the recurrence of nasal polyps following treatment with steroids.
Supplements may have side effects or interact with medications you are taking, so you should discuss any supplements you are considering with your healthcare provider.
Bromelain There is some evidence that bromelain, an enzyme derived from pineapples, may reduce inflammation and swelling and relieve symptoms of sinusitis. Bromelain may increase the risk of bleeding, so people who take blood thinners should not take bromelain without talking to their doctor first. Taking bromelain with ACE inhibitors may cause blood pressure to drop.
Quercetin Quercetin is a flavonoid that has been shown to inhibit the production and release of histamine in lab studies. Histamine causes allergy symptoms such as a runny nose and watery eyes. But more studies are needed to confirm that it has the same effect in humans.
Sinupret This herbal combination is produced in Europe and imported into the United States. Sinupret contains Sambucus nigra (European elder), Rumex acetosa (common sorrel), Primula veris (cowslip), Verbena officinalis (European vervain), and Gentiana lutea (gentian). The herbs it contains may work by thinning mucus and helping the sinuses drain, which can relieve some of the symptoms of sinusitis.
In a review of existing literature on various alternative and complementary therapies for chronic rhinosinusitis and chronic rhinosinusitis with nasal polyps, in which studies involving baby shampoo, honey, capsaicin, therapeutic ultrasonography, phonophoresis, phototherapy, and acupuncture were investigated, the authors concluded that there wasn’t enough evidence to recommend any of the treatments for widespread use.
Prevention of Nasal Polyps
Although there isn’t a drug or lifestyle change that can prevent nasal polyps, there are a few strategies that may reduce your chances of developing them or having a recurrence after treatment, including:
- Medical management of allergies and asthma
- Avoidance of nasal irritants such as dust, air pollution, and smoke
- Good hand hygiene
- Humidifier use
Neti Pot or Nasal Rinse A neti pot is a little teapot with a long spout that can be used to flush out nasal passages with saline solution to improve mucus flow and remove allergens and irritants. If you do use a neti pot, be sure to use distilled, sterile, or previously boiled water. Tap water isn’t safe to use because it contains low levels of bacteria and protozoa, including amoebas.
Nasal Polyps Prognosis
The prognosis for nasal polyps can vary widely from case to case, says Kim. The likelihood that polyps will recur after treatment may depend on the underlying condition that led to the polyps in the first place. It can also depend on how regularly an individual with polyps uses prescribed treatments and practices recommended self-care protocols.
“As far as we know, we do not have a drug that will take nasal polyps away permanently,” says Kim. If you find a medication that works to treat your nasal polyps, you will have to stay on that medication, or the polyps will come back, she says.
“If your nasal polyps get to a phase in which you have a very large and significant polyp load, it’s very hard to get them to go away,” she says.
Though they can negatively impact quality of life and make breathing more difficult, there isn’t evidence that nasal polyps increase the risk of death.
Complications of Nasal Polyps
Nasal polyps can cause additional health problems that are important to know about.
- Obstructive Sleep Apnea People with chronic rhinosinusitis who also have nasal polyps often have sleep disruption and sleep apnea. In some cases, larger polyps can fill 75 to 90 percent of the nasal cavity, which can lead to mouth breathing and snoring and possibly result in sleep apnea.
- Asthma Flare-Ups If a person has really severe nasal polyp disease, it can impact their breathing and sometimes worsen asthma for a person who has asthma, says Kim.
Sinus Infections Sinus infections are a common complication of nasal polyps. - Other Infections In rare cases, nasal polyps can lead to more serious infections, including infection of the tissue around the brain and spinal cord (meningitis), infection around the tissue of the eye, or infection of the sinus bones.
Research and Statistics: Who Has Nasal Polyps?
Nasal polyps can develop in anyone, and they are common. It’s estimated that about 4 percent of Americans (13 million) have them. Men are more prone to nasal polyps than women, although women seem to have more-severe cases.
It’s rare that someone has nasal polyps before the age of 30. If a child develops nasal polyps, they should be evaluated for cystic fibrosis. Nasal polyps are present in up to 86 percent of people with cystic fibrosis.
Disparities and Inequities in Nasal Polyps
More research is needed to determine if nasal polyps are more prevalent or severe in people of different races and ethnicities than in white Americans. Lower rates of surgery for nasal polyps have been reported in Black and Hispanic populations, but this may be due to lack of access to care or failure to seek care rather than lower prevalence.
Asthma is a risk factor for nasal polyps, and Black Americans are disproportionately impacted by asthma. In 2023, Black Americans were 30 percent more likely to have asthma than white Americans.
Related Conditions
Nasal polyps are associated with a number of other medical conditions, including these.
Allergic Fungal Rhinosinusitis (AFRS) AFRS is a particular type of chronic rhinosinusitis that occurs because of an allergic response to inhaled fungi in a predisposed individual with nasal polyps. It tends to occur more often in the southern United States and along the Mississippi River Basin.
Asthma In people with asthma, the airways in the lungs can become inflamed and narrowed during an attack, which can make it harder to breathe. This chronic condition often begins in childhood; about 1 in 13 people in the United States have asthma.
Cystic Fibrosis (CF) Cystic fibrosis is a genetic condition that impacts the body’s cells, tissues, and glands that make mucus and sweat. People with CF have thick, sticky mucus that can build up in the body and cause blockages and infections.
Samter’s Triad Also known as aspirin-exacerbated respiratory disease (AERD), Samter’s triad is a nonallergic hypersensitivity reaction in which people have three conditions: asthma, aspirin allergy, and nasal polyps. It occurs in less than 1 percent of the general public and typically develops between ages 29 and 34.
The Takeaway
- Nasal polyps are unhealthy growths of tissue that can form in the sinus cavities. They’re very common in people with chronic rhinosinusitis (CRS), a condition characterized by inflammation in the nasal and sinus cavities.
- Risk factors for nasal polyps include CRS, genetics, asthma, allergies, cystic fibrosis, vitamin D deficiency, and sensitivity to aspirin, among others.
- Treatment options for nasal polyps may include medication or surgery. Dietary supplements may help in some cases, but you should talk to your doctor before trying any new supplements.
Resources We Trust
- Mayo Clinic: Nasal Polyps: Symptoms & Causes
- Cleveland Clinic: Nasal Polyps
- MedlinePlus: Nasal Polyps
- Harvard Health Publishing: First Medication to Treat Uncontrolled Nasal Polyps
- Johns Hopkins Medicine: Nasal Polyps
EDITORIAL SOURCES
Everyday Health follows strict sourcing guidelines to ensure the accuracy of its content, outlined in our editorial policy. We use only trustworthy sources, including peer-reviewed studies, board-certified medical experts, patients with lived experience, and information from top institutions.
Resources
- Nasal Polyps. American Academy of Allergy, Asthma, & Immunology. December 27, 2023.
- Nasal Polyps. Cleveland Clinic. January 16, 2024.
- Nasal Polyps: Symptoms & Causes. Mayo Clinic. August 8, 2023.
- Lou H et al. Highlights of eosinophilic chronic rhinosinusitis with nasal polyps in definition, prognosis, and advancement. International Forum of Allergy & Rhinology. October 2018.
- Bohman A et al. Heredity, symptoms and risk factors of nasal polyps. Clinical and Translational Allergy. June 2015.
- Bernstein JM et al. Genetic Polymorphisms in Chronic Hyperplastic Sinusitis with Nasal Polyposis. The Laryngoscope. October 11, 2010.
- Churg-Strauss Syndrome: Symptoms & Causes. Mayo Clinic. February 7, 2024.
- Veloso-Teles R et al. Higher prevalence of nasal polyposis among textile workers: an endoscopic based and controlled study. Rhinology. June 2018.
- Nasal Polyps: Diagnosis & Treatment. Mayo Clinic. August 8, 2023.
- Nasal Polyps and Tumors. Mass General Brigham.
- Attia TM. Role of Omega-3 Polyunsaturated Fatty Acids in Treatment of Nasal Polyposis. American Journal of Rhinology & Allergy. August 21, 2019.
- Bromelain. National Center for Complementary and Integrative Health. November 2024.
- Bromelain. Memorial Sloan Kettering. December 19, 2023.
- Chakraborty AJ et al. Bromelain a Potential Bioactive Compound: A Comprehensive Overview from a Pharmacological Perspective. Life. April 2021.
- Jafarinia M et al. Quercetin with the potential effect on allergic diseases. Allergy, Asthma, and Clinical Immunology. May 2020.
- Taw MB et al. Integrative Approach to Rhinosinusitis: An Update. Otolaryngologic Clinics of North America. October 2022.
- Griffin AS et al. Alternative therapies for chronic rhinosinusitis: A review. Ear, Nose & Throat Journal. October 6, 2020.
- Is Rinsing Your Sinuses With Neti Pots Safe? U.S. Food and Drug Administration. April 28, 2025.
- Del Toro E et al. Nasal Polyps. StatPearls. May 5, 2025.
- Could nasal polyps be the cause of your stuffy nose? Johns Hopkins Medicine.
- Chronic Sinusitis and Nasal Polyps. University of Michigan Health.
- Nasal Polyps. Asthma and Allergy Foundation of America. July 2024.
- Woodard T et al. Variation in Delivery of Sinus Surgery in the Medicaid Population across Ethnicities. Otolaryngology–Head and Neck Surgery. February 23, 2016.
- Asthma and Black/African Americans. U.S. Department of Health and Human Services Office of Minority Health. May 19, 2025.
- What Is Asthma? National Heart, Lung, and Blood Institute. April 17, 2024.
- What Is Cystic Fibrosis? National Heart, Lung, and Blood Institute. November 15, 2024.
- Kim S et al. Samter’s Triad: State of the Art. Clinical and Experimental Otorhinolaryngology. April 2018.
Meet Our Experts
Jessica Lee, MD
Medical Reviewer
Jessica Lee, MD, practices general otolaryngology at Charleston ENT and Allergy in South Carolina. After several years in clinical and surgical practice, Dr. Lee wanted to learn more about the impact of nutrition, activity, and sleep on general health and ear, nose, and throat health, so she pursued additional training in integrative, lifestyle, and functional medicine topics and became board-certified in lifestyle medicine in 2021.
Her practice centers on first addressing the lifestyle causes of disease and chronic illness, with the understanding and ability to use medical and surgical care for more acute concerns. She is also the co-founder and director of the Keto Hope Foundation, a nonprofit dedicated to helping families use the ketogenic diet as medical treatment for epilepsy
Lee enjoys cooking, strength training, reading, and spending time with friends and family.
Her practice centers on first addressing the lifestyle causes of disease and chronic illness, with the understanding and ability to use medical and surgical care for more acute concerns. She is also the co-founder and director of the Keto Hope Foundation, a nonprofit dedicated to helping families use the ketogenic diet as medical treatment for epilepsy
Becky Upham
Author
Becky Upham has worked throughout the health and wellness world for over 25 years. She's been a race director, a team recruiter for the Leukemia and Lymphoma Society, a salesperson for a major pharmaceutical company, a blogger for Moogfest, a communications manager for Mission Health, a fitness instructor, and a health coach.
Upham majored in English at the University of North Carolina and has a master's in English writing from Hollins University.
Upham enjoys teaching cycling classes, running, reading fiction, and making playlists.