Nasal polyps are soft, noncancerous growths that form in the lining of your nose or sinuses and can cause a blocked or stuffy nose, reduced sense of smell, and sometimes sinus infections.

What are nasal polyps?

Nasal polyps are painless , teardrop- or grape-like swellings of the mucosa (the soft, moist lining) inside the nasal passages and sinus cavities.

They are benign, meaning they are not tumors and do not by themselves increase the risk of cancer.

They often:

  • Hang down from the lining like small grapes or sacs.
  • Occur on both sides of the nose rather than just one.
  • Are associated with long‑term (chronic) inflammation in the nose and sinuses.

Causes and risk factors

Doctors don’t know one single exact cause, but nasal polyps are strongly linked to chronic inflammation of the nasal and sinus lining.

Common associated conditions:

  • Chronic sinusitis (sinus inflammation lasting more than 12 weeks).
  • Asthma and allergic rhinitis (nasal allergies).
  • Aspirin-exacerbated respiratory disease (AERD: asthma, nasal polyps, and reactions to aspirin/NSAIDs).
  • Cystic fibrosis and certain genetic or immune conditions (less common but important in younger patients).

Inflammation from infections or allergies can cause the lining to swell, produce extra fluid, and eventually balloon out into polyps.

Symptoms you might notice

Small polyps may cause no symptoms at all.

Larger or multiple polyps can block airflow and drainage, leading to:

  • Stuffy or blocked nose and mouth breathing.
  • Reduced or lost sense of smell (and often taste).
  • Runny nose or postnasal drip.
  • Pressure, fullness, or pain in the face or forehead.
  • Frequent or chronic sinus infections.
  • Snoring, poor sleep, or sleep apnea in more severe cases.

If someone has asthma, uncontrolled nasal polyps can also worsen asthma symptoms and trigger more frequent attacks.

Diagnosis in simple terms

An ENT (ear, nose, and throat) specialist or doctor usually:

  1. Looks inside the nose with a light or a small camera (nasal endoscopy) and can often see the polyps directly.
  1. May order a CT scan of the sinuses to see how extensive they are and to plan treatment or surgery.
  1. May do allergy testing or tests for asthma or cystic fibrosis, especially in young people or those with severe/recurrent polyps.

Treatment options

The goal is to reduce inflammation, shrink polyps, open the nose, and improve breathing and smell.

Common treatments:

  • Nasal steroid sprays (first-line): Help shrink polyps and control inflammation over time.
  • Short courses of oral steroids : Sometimes used for more severe symptoms, but usually only for limited periods due to side effects.
  • Saline rinses (e.g., nasal irrigation): Help wash out mucus and irritants, and can improve the effect of sprays.
  • Treating underlying issues: Allergy medications, asthma control, avoiding triggers like aspirin in AERD.
  • Surgery (endoscopic sinus surgery) : Used if medicines don’t help enough or polyps are very large; the surgeon removes polyps and opens blocked sinus passages.
  • Newer biologic injections (for some people with severe polyps and asthma): Target parts of the immune response driving the inflammation.

Even after surgery, polyps can come back, so ongoing medical treatment and follow‑up are usually needed.

Is this an emergency?

Nasal polyps themselves are usually not dangerous, but you should get urgent medical care if you notice:

  • Sudden, severe trouble breathing or chest tightness.
  • Double vision, eye swelling, or severe headache with nasal symptoms.
  • High fever with facial swelling or intense pain, which could signal a serious sinus infection.

For long‑term stuffy nose, loss of smell, or repeated sinus infections, it’s important to see a doctor (ideally an ENT) to confirm whether polyps are the cause and to start treatment.

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  • Meta-style summary: Nasal polyps are noncancerous swellings in the nose and sinuses that come from chronic inflammation and can block breathing; they’re treated with sprays, medicines, and sometimes surgery.

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