Nasal Polyps: Symptoms, Diagnosis, and Treatment Approaches

AI Overview Summary: Nasal polyps are soft, painless, non-cancerous growths on the lining of the nasal passages or sinuses. They result from chronic inflammation and are often associated with asthma, allergic rhinitis, or aspirin-exacerbated respiratory disease (AERD) . Symptoms include nasal congestion, reduced sense of smell, post-nasal drip, and facial pressure. Treatment begins with medical management (nasal steroid sprays, oral steroids, biologic medications) and may progress to endoscopic polypectomy or FESS for large polyps.

Key Takeaways

• What are nasal polyps: Soft, non-cancerous growths in the nose or sinuses caused by chronic inflammation.
• Common symptoms: Nasal congestion, reduced sense of smell, post-nasal drip, facial pressure.
• Associated conditions: Asthma (20-40% of patients), allergic rhinitis, AERD (aspirin sensitivity).
• Treatment ladder: Medical management first (sprays, steroids, biologics). Surgery only if medical therapy fails.
• Recurrence rate: Approximately 40% within 5 years, requiring ongoing medical management.

Disclaimer: This information is for educational purposes only and does not constitute medical advice. Individual results vary. Please consult a qualified health practitioner for personal advice about your condition.

What Are Nasal Polyps?

Nasal polyps are soft, painless, non-cancerous (benign) growths that develop on the lining of the nasal passages or sinuses. They look like peeled grapes or small gelatinous sacs.

Polyps result from chronic inflammation of the nasal and sinus lining. Over time, the inflamed tissue swells, fluid accumulates, and gravity pulls the tissue downward, forming a polyp.

Polyps can be:

• Unilateral (one side only) – more concerning, requires evaluation to exclude tumour
• Bilateral (both sides) – typical for inflammatory polyps

Polyps range in size from:

• Small: Visible only on nasal endoscopy, causing mild symptoms
• Large: Filling the entire nasal passage, causing severe obstruction and loss of smell

For authoritative information on nasal polyps, visit the Better Health Channel – Nasal Polyps.

Who Gets Nasal Polyps?

Nasal polyps affect approximately 1-4% of the general population. They are more common in:

Risk Factor	Prevalence
Asthma	20-40% of patients with nasal polyps have asthma
Aspirin-exacerbated respiratory disease (AERD)	10-15% of patients with polyps have AERD
Allergic rhinitis	Common association
Cystic fibrosis	20-50% of CF patients have polyps (primarily children)
Allergic fungal sinusitis	Common in warm, humid climates
Age	More common in adults over 40; rare in children (unless CF)
Male gender	Slightly more common in men

Causes of Nasal Polyps

Nasal polyps result from chronic inflammation of the nasal and sinus lining. The exact cause is not fully understood, but several factors contribute:

Underlying Conditions Associated with Nasal Polyps

Condition	Explanation
Asthma	Shared inflammatory pathways (type 2 inflammation)
Aspirin-exacerbated respiratory disease (AERD)	Aspirin sensitivity with asthma, polyps, and sinusitis
Allergic rhinitis	Chronic allergy-induced inflammation
Cystic fibrosis	Genetic disorder affecting mucus clearance
Allergic fungal sinusitis	Immune reaction to fungus in sinuses
Primary ciliary dyskinesia	Genetic disorder affecting cilia function

Inflammatory Pathways

Nasal polyps are characterized by type 2 inflammation – the same inflammatory pathway involved in asthma and eczema. Key inflammatory cells and chemicals include:

• Eosinophils (white blood cells)
• Interleukin-4, interleukin-5, interleukin-13 (inflammatory signals)
• Immunoglobulin E (IgE) (allergy antibody)

This is why medications that block these inflammatory signals (biologics) are effective for nasal polyps.

For information on AERD and its association with nasal polyps, visit the Australian Society of Clinical Immunology and Allergy (ASCIA) – Aspirin Sensitivity.

Symptoms of Nasal Polyps

Symptoms depend on the size and location of the polyps. Small polyps may cause no symptoms. Large polyps cause significant obstruction.

Common Symptoms

Symptom	How Common	Explanation
Nasal congestion	Very common (90%+)	Polyps block the nasal passages
Reduced sense of smell (hyposmia)	Very common (80%+)	Polyps block airflow to olfactory nerves
Complete loss of smell (anosmia)	Common (40-50%)	Large polyps completely obstruct smell
Post-nasal drip	Common	Mucus drains down the back of the throat
Nasal discharge	Common	Clear or coloured mucus
Facial pressure or pain	Less common	If sinuses are also inflamed
Snoring or sleep apnoea	Common	Nasal obstruction affects sleep
Nasal voice (hyponasal speech)	Less common	Sounding “blocked up”

Less Common Symptoms

• Itching around the eyes (if associated with allergies)
• Frequent nosebleeds (from inflamed tissue)
• Headache (if sinusitis is also present)

Symptom Progression

Stage	Symptoms
Early (small polyps)	Mild nasal congestion, occasional reduced smell
Moderate (medium polyps)	Persistent congestion, noticeable loss of smell, post-nasal drip
Advanced (large polyps)	Severe obstruction (mouth breathing), complete loss of smell, snoring, sleep disturbance

For more detailed information on nasal obstruction symptoms, read our cluster guide: Nasal Obstruction: When to See an ENT Doctor

Diagnosis of Nasal Polyps

An ENT doctor in Sydney will diagnose nasal polyps using the following approaches:

1. Medical History Review

The doctor asks about:

• Symptoms (nasal congestion, loss of smell, discharge)
• Duration (weeks, months, or years)
• Associated conditions (asthma, AERD, allergies, cystic fibrosis)
• Previous treatments (nasal sprays, oral steroids, surgery)
• Medication allergies (especially aspirin)

2. Nasal Endoscopy

This is the gold standard diagnostic procedure. The doctor passes a thin, flexible tube with a small camera through the nostril (1-2 minutes).

What the doctor looks for:

Finding	Indicates
Smooth, pale, grape-like growths	Nasal polyps
Yellowish, friable polyps	Allergic fungal sinusitis
Polyps on one side only (unilateral)	Possible tumour (inverted papilloma or cancer) – requires biopsy
Polyps on both sides (bilateral)	Inflammatory polyps (typical)

3. CT Scan of the Sinuses

A CT scan is usually ordered to:

• Assess the extent of polyps (which sinuses are involved)
• Plan surgery (if needed)
• Rule out tumours (if unilateral)
• Evaluate bone erosion (rare, suggests aggressive disease)

What the CT scan shows:

• Soft tissue opacification (polyps filling the sinuses)
• Bone thinning or widening (from chronic pressure)
• Sinus anatomy (for surgical planning)

4. Allergy Testing

If allergic rhinitis is suspected, the doctor may recommend:

• Skin prick testing (small amounts of allergens placed on the skin)
• Blood tests (specific IgE to common allergens)

5. Blood Tests

Blood tests may include:

• Total IgE (elevated in allergic fungal sinusitis)
• Eosinophil count (elevated in eosinophilic polyps)
• Aspirin challenge test (for AERD, in specialist centres)

For more detailed information on sinus CT imaging, read our cluster guide: Chronic Sinusitis: Causes, Symptoms, and Treatment Options

Treatment Options for Nasal Polyps

Treatment follows a stepwise approach – starting with medical management and progressing to surgery only if medical therapy fails. Even after surgery, ongoing medical management is usually required to prevent recurrence.

Medical Management (First-Line Treatment)

Treatment	How It Works	Typical Duration	Effectiveness
Intranasal corticosteroid sprays	Reduces inflammation in the nose (e.g., Flixonase, Nasonex, Rhinocort)	Daily, ongoing	Reduces polyp size by 20-30%
Intranasal corticosteroid drops	More concentrated delivery to polyps (e.g., Pulmicort respules)	4-8 weeks, then maintenance	More effective than sprays
Oral corticosteroids	Powerful anti-inflammatory (e.g., prednisolone 50mg daily for 5-10 days)	Short course (5-10 days)	Shrinks polyps rapidly (60-80% reduction)
Saline nasal rinses	Clears mucus, improves medication delivery	Twice daily, ongoing	Adjunctive (helps other treatments work better)
Biologic medications	Block specific inflammatory pathways (e.g., dupilumab, mepolizumab, omalizumab)	Injection every 2-4 weeks, ongoing	Highly effective (50-80% reduction)

Biologic Medications for Nasal Polyps

Biologics are a newer class of medications that target specific inflammatory pathways. They are typically reserved for patients with severe, recurrent polyps who have failed surgery and medical management.

Biologic	Target	Indication	Effectiveness
Dupilumab (Dupixent)	IL-4/IL-13 receptor	Severe polyps with asthma	60-80% reduction in polyp size and symptom improvement
Mepolizumab (Nucala)	IL-5	Eosinophilic polyps with asthma	50-70% improvement
Omalizumab (Xolair)	IgE	Polyps with asthma and allergies	50-70% improvement

Cost: Biologics are expensive ($10,000-$20,000 per year) but may be covered by the Pharmaceutical Benefits Scheme (PBS) for eligible patients with severe disease.

Surgical Treatment (When Medical Therapy Fails)

Surgery is recommended when:

• Medical management (including oral steroids or biologics) has failed
• Polyps are large and causing severe obstruction
• Loss of smell is complete and persistent
• The patient has AERD or allergic fungal sinusitis (which often requires surgery)

Surgical Procedures for Nasal Polyps

Procedure	What It Does	Recovery Time
Endoscopic polypectomy	Removes polyps from the nasal passages	3-7 days off work
Functional endoscopic sinus surgery (FESS)	Removes polyps from sinuses and opens sinus drainage pathways	5-7 days off work; full healing 4-6 weeks

Important notes about surgery:

• Surgery removes polyps but does not cure the underlying inflammation
• Most patients need ongoing medical therapy after surgery (nasal sprays, saline rinses, sometimes biologics)
• Polyps recur in approximately 40% of patients within 5 years

For more detailed information on FESS, read our cluster guide: Endoscopic Sinus Surgery (FESS): Information for Patients

Nasal Polyps and AERD (Aspirin-Exacerbated Respiratory Disease)

AERD (also called Samter’s Triad) is a condition characterized by:

1. Asthma (usually moderate to severe)
2. Nasal polyps (recurrent, difficult to treat)
3. Aspirin sensitivity (reactions to aspirin and NSAIDs)

Key Features of AERD

Feature	Details
Prevalence	10-15% of patients with nasal polyps
Age of onset	Usually 20-40 years
Aspirin reaction	Respiratory symptoms (nasal congestion, wheezing) within 30-120 minutes
Polyp recurrence	Very high (often require multiple surgeries)
Response to biologics	Excellent (dupilumab is highly effective)

Management of AERD

• Avoid aspirin and NSAIDs (ibuprofen, naproxen, diclofenac)
• Use paracetamol (Panadol) for pain relief (safe)
• Biologics (dupilumab) are highly effective
• Aspirin desensitization (specialist centre only) – induces tolerance but requires daily high-dose aspirin

For more detailed information on AERD, visit the Australian Society of Clinical Immunology and Allergy (ASCIA) – Aspirin Sensitivity.

When to See an ENT Doctor for Nasal Polyps

You should request a GP referral to an ENT doctor in Sydney if:

• You have persistent nasal congestion with reduced sense of smell
• You have been told you have nasal polyps on a previous examination
• You have asthma that is difficult to control (unrecognised polyps may be contributing)
• You have unilateral nasal obstruction (one side only) – requires evaluation to exclude tumour
• Medical management (nasal steroid sprays) has not improved symptoms after 4-8 weeks

For more detailed information, read our pillar guide: ENT Doctors in Sydney for Nose and Sinus Conditions

Living with Nasal Polyps: Self-Management Tips

In addition to medical treatment, patients can reduce symptoms and prevent recurrence by:

• Using saline rinses daily (NeilMed or FLO bottles) – improves medication delivery
• Using nasal steroid sprays consistently (not just when symptomatic)
• Treating underlying asthma (good asthma control reduces nasal inflammation)
• Avoiding aspirin and NSAIDs (if AERD is suspected)
• Managing allergies (antihistamines, allergy immunotherapy)
• Using a humidifier (prevents nasal drying)

Red Flags: When to Seek Urgent Medical Care

Seek immediate medical attention (emergency department or call 000) if you experience:

• Unilateral nasal polyp with bleeding or facial numbness (possible tumour)
• Sudden worsening of vision or double vision
• Facial swelling spreading to the eye
• Severe headache with fever

These symptoms may indicate a sinus tumour, infection spreading to the eye, or meningitis.

For more detailed information on red flags, read our cluster guide: Sinus Headaches and Facial Pain: Causes and Diagnosis

Frequently Asked Questions (FAQs)

General FAQs

1. Are nasal polyps cancerous?
   No. The vast majority of nasal polyps are benign (non-cancerous). However, unilateral polyps (one side only) should be evaluated to exclude a tumour.
2. What causes nasal polyps?
   Chronic inflammation of the nasal and sinus lining, often associated with asthma, allergies, AERD, or cystic fibrosis.
3. Can nasal polyps go away on their own?
   Rarely. Small polyps may shrink with medical treatment (steroid sprays or oral steroids). They do not typically resolve without treatment.
4. Are nasal polyps contagious?
   No. Nasal polyps are caused by inflammation, not infection.
5. Can children get nasal polyps?
   Yes, but it is rare. Nasal polyps in children should raise suspicion for cystic fibrosis or primary ciliary dyskinesia.

Symptoms FAQs

6. What does loss of smell from nasal polyps feel like?
   Complete or partial inability to detect odours. Some patients cannot smell food, smoke, or gas – which can be dangerous.
7. Do nasal polyps cause pain?
   Nasal polyps themselves are painless. However, they may cause facial pressure if the sinuses are also inflamed.
8. Can nasal polyps cause snoring?
   Yes. Nasal polyps cause nasal obstruction, which leads to mouth breathing and snoring during sleep.
9. Do nasal polyps affect taste?
   Yes. Taste is closely linked to smell. Loss of smell (anosmia) significantly reduces the ability to taste flavours.
10. Can nasal polyps cause nosebleeds?
    Occasionally. The inflamed polyp tissue is fragile and may bleed, especially with nose blowing or nasal spray use.

Treatment FAQs

11. Can nasal polyps be treated without surgery?
    Yes. Medical management (nasal steroid sprays, oral steroids, biologics) is the first-line treatment. Surgery is only for patients who fail medical therapy.
12. How effective are nasal steroid sprays for polyps?
    Nasal steroid sprays reduce polyp size by 20-30% and improve symptoms. Intranasal steroid drops are more effective (50-60% reduction).
13. How effective are oral steroids for polyps?
    Very effective in the short term (60-80% reduction in polyp size). However, long-term use is limited by side effects (weight gain, insomnia, bone thinning, diabetes).
14. What are biologic medications for nasal polyps?
    Biologics (dupilumab, mepolizumab, omalizumab) block specific inflammatory pathways. They are highly effective for severe, recurrent polyps but are expensive.
15. Is surgery a cure for nasal polyps?
    No. Surgery removes polyps but does not cure the underlying inflammation. Most patients need ongoing medical therapy after surgery.

Recurrence FAQs

16. Do nasal polyps come back after surgery?
    Yes. Recurrence rate is approximately 40% within 5 years. Recurrence is higher in patients with asthma, AERD, or allergic fungal sinusitis.
17. How can I prevent nasal polyps from coming back?
    Use nasal steroid sprays daily, perform saline rinses, treat underlying asthma and allergies, and avoid aspirin (if AERD).
18. How many times can nasal polyps be removed surgically?
    Multiple times. Some patients with AERD or allergic fungal sinusitis require surgery every 1-3 years despite optimal medical management.
19. Do biologics prevent polyp recurrence?
    Yes. Biologics (especially dupilumab) significantly reduce recurrence and may eliminate the need for surgery in some patients.
20. What is the long-term outlook for nasal polyps?
    Variable. With consistent medical management, many patients maintain good symptom control. Patients with AERD or allergic fungal sinusitis have more aggressive disease and higher recurrence rates.

Summary

Nasal polyps are soft, non-cancerous growths caused by chronic inflammation of the nasal and sinus lining. They are associated with asthma, allergic rhinitis, and aspirin-exacerbated respiratory disease (AERD) . Symptoms include nasal congestion, reduced sense of smell, post-nasal drip, and facial pressure. 

Treatment begins with medical management (nasal steroid sprays, oral steroids, biologic medications) and may progress to endoscopic polypectomy or FESS for patients who do not improve with medical therapy alone. Even after surgery, recurrence is common (40% within 5 years) , requiring ongoing medical management.

For specific medical advice about your condition, please consult a qualified ENT doctor in Sydney such as Dr. Brett Leavers or another registered ENT specialist.