Why Can Nasal Polyps Affect Your Sense of Smell?

Changes in your sense of smell can be confusing and frustrating, especially when they persist without showing signs of improvement.

Several factors can affect your ability to smell, including nasal polyps. These are soft, noncancerous growths that can develop along the nasal and sinus linings. Depending on their size, location, and associated inflammation, they may contribute to a reduced sense of smell and other nasal or sinus symptoms.

At West Palm Beach Breathe Free, we help patients understand what nasal polyps are, how they may affect the sense of smell, and which treatment and management strategies may be appropriate.

What Are Nasal Polyps?

Nasal polyps are soft, painless, noncancerous (benign) growths that develop from the lining of the nasal passages or sinuses. They often have a teardrop shape, although larger polyps may resemble peeled grapes.

Nasal polyps commonly occur on both sides of the nose and may develop individually or in clusters.

While nasal polyps are benign, they can contribute to nasal obstruction and interfere with sinus drainage, particularly when they become large or occur alongside significant inflammation.

Not everyone with nasal polyps experiences noticeable symptoms.

Why Do Nasal Polyps Affect the Sense of Smell?

Nasal polyps can affect the sense of smell through more than one mechanism.

1. Nasal Polyps Can Restrict Airflow to the Smell-Sensing Region

When nasal polyps become large or develop in clusters, they may obstruct airflow through parts of the nasal cavity.

This can make it more difficult for odor molecules to reach the olfactory region, which is located high inside the nose.

When fewer odor molecules reach the smell receptors, a person's ability to detect certain scents may decrease.

2. Chronic Inflammation Can Affect the Smell-Sensing Tissue

Smell loss associated with nasal polyps is not always caused by physical blockage alone.

Chronic inflammation in the nasal and sinus lining may also affect the olfactory epithelium, the specialized tissue responsible for detecting odors.

As a result, a reduced sense of smell may occur even when the nasal passages are not completely blocked.

The extent of smell changes varies from person to person, and improvement following treatment is not guaranteed.

Other conditions, including respiratory infections, certain medications, and neurological disorders, may also affect the sense of smell.

A sudden, unexplained, or persistent change in smell warrants medical evaluation to determine whether nasal polyps or another underlying condition may be contributing.

What Are the Symptoms of Nasal Polyps?

Symptoms vary depending on the size and location of the polyps and the degree of associated inflammation.

Small polyps may cause few or no noticeable symptoms, while larger or multiple polyps may contribute to:

• Nasal congestion
• Difficulty breathing through the nose
• Sinus pressure or discomfort
• A runny nose
• Postnasal drip, or mucus draining down the back of the throat
• A reduced or lost sense of smell
• Changes in the perception of flavor
• Headaches
• Snoring or noisy breathing associated with nasal obstruction

Nasal polyps are commonly associated with chronic rhinosinusitis and may coexist with asthma.

Some patients with both asthma and nasal polyps may experience more difficult-to-control airway inflammation.

Nasal obstruction may also contribute to snoring or disturbed sleep, although nasal polyps are not necessarily a direct cause of obstructive sleep apnea.

An ENT evaluation can help determine whether these symptoms are related to nasal polyps or another condition.

What Causes Nasal Polyps?

The exact reasons some people develop nasal polyps while others do not are not fully understood.

However, nasal polyps are strongly associated with persistent inflammation of the nasal and sinus lining.

Certain conditions may be associated with an increased likelihood of developing nasal polyps, including:

• Allergies
• Chronic sinusitis
• Asthma
• Cystic fibrosis

Not everyone with these conditions develops nasal polyps, and nasal polyps can occur in people without a known history of allergies.

What Are the Treatment Options for Nasal Polyps?

Treatment depends on several factors, including symptom severity, the size and extent of the polyps, associated inflammation, previous treatment response, and individual health needs.

The goals of treatment may include reducing inflammation, improving nasal breathing, managing sinus symptoms, and addressing changes in the sense of smell when possible.

Medications

Medications are often used to manage the inflammation associated with nasal polyps.

Depending on the patient's condition, treatment options may include:

• Nasal saline sprays or rinses: May help clear mucus and irritants and improve nasal comfort, although they do not directly remove polyps.
• Intranasal corticosteroids: May help reduce inflammation, shrink polyps, and improve certain symptoms.
• Short courses of oral corticosteroids: May be considered in selected cases to temporarily reduce significant inflammation and polyp size.
• Biologic medications: Treatments such as dupilumab may be appropriate for certain patients with inadequately controlled chronic rhinosinusitis with nasal polyps.
• Antibiotics: May be prescribed when a bacterial infection is suspected or confirmed, but they do not directly treat nasal polyps.

Treatment effectiveness varies. Some patients experience symptom improvement with medication, while others may need additional evaluation or treatment.

Surgery

When symptoms remain significant despite appropriate medical management, an ENT specialist may discuss surgical options.

Procedures used to address nasal polyps may include:

• Polypectomy: Polypectomy involves surgically removing nasal polyps using specialized instruments, often with endoscopic visualization. The approach depends on the location and extent of the growths.
• Functional endoscopic sinus surgery (FESS): FESS uses an endoscope and specialized instruments to remove polyps and other obstructing tissue when appropriate. It may also improve access to affected sinuses and help restore sinus drainage pathways.

What About Balloon Sinuplasty?

Balloon sinuplasty is a minimally invasive procedure used for certain sinus drainage problems.

However, balloon sinuplasty does not remove nasal polyps and is not a primary treatment for nasal polyposis.

An ENT specialist can determine whether any additional sinus procedure is appropriate based on the patient's diagnosis, anatomy, and treatment needs.

Nasal polyps can recur after treatment, including after surgical removal. Ongoing medical management and follow-up care may therefore be recommended.

Treatment may improve the sense of smell in some patients, but the degree of improvement varies, and complete recovery cannot be guaranteed.

When Is It Time to See an ENT Specialist for Nasal Polyps?

Consider scheduling an ENT appointment if you experience:

• Sinus symptoms that do not improve with appropriate treatment
• Frequent or recurring sinus symptoms
• Symptoms that interfere with sleep, work, or daily activities
• Persistent nasal congestion
• A reduced or altered sense of smell
• Postnasal drip that continues for several weeks
• Chronic coughing or frequent throat clearing
• Difficulty breathing comfortably through the nose

An ENT specialist can examine the nasal passages and determine whether nasal polyps, inflammation, or another condition may be contributing to these symptoms.

When Should You Seek Emergency Medical Attention?

Some symptoms may indicate a more serious condition and should not be attributed to nasal polyps without evaluation.

Seek emergency medical attention for:

• Sudden vision changes or loss of vision
• Significant swelling around the eyes, particularly when accompanied by pain or vision changes
• A severe headache accompanied by fever, neck stiffness, or confusion
• Severe breathing difficulty
• Significant or uncontrolled bleeding

When Should You Arrange Prompt Medical Evaluation?

Other symptoms may not require emergency care but should be assessed without unnecessary delay.

Arrange prompt medical evaluation for:

• Recurrent nosebleeds or persistent bloody nasal discharge
• Persistent obstruction affecting only one side of the nose
• A suspected growth on only one side of the nose
• Persistent foul-smelling discharge from one nostril
• New or unexplained facial numbness

Nasal polyps commonly affect both sides of the nose. A persistent one-sided growth or obstruction should be evaluated because other conditions can produce similar symptoms.

Conclusion: When Nasal Polyps Start Affecting Your Sense of Smell

Nasal polyps can affect the sense of smell by restricting airflow to the smell-sensing region of the nose and through inflammation that affects olfactory function.

However, not every change in smell is caused by nasal polyps, and an accurate diagnosis is important before deciding on treatment.

West Palm Beach Breathe Free offers ear, nose, and throat care services for patients in West Palm Beach and surrounding communities.

If you are experiencing persistent nasal congestion, difficulty breathing through the nose, a reduced sense of smell, or a suspected nasal growth, get in touch with our team to discuss possible contributing factors and treatment options appropriate for your individual needs.