Nasal Polyps and Chronic Sinus Congestion: When It Is More Than Allergies

Nasal polyps can cause chronic congestion, lost smell, and recurring sinus infections. Learn what causes them and when a Las Vegas allergist can help.

If chronic nasal congestion, recurring sinus infections, or a slowly fading sense of smell has not improved despite months of allergy medication, nasal polyps may be part of the picture. Polyps are one of the most under-recognized drivers of stubborn sinus symptoms, and they are common enough that they are listed on the Tottori conditions we treat page under Nasal and Sinus Conditions. This guide explains what nasal polyps are, why they form, and how a Las Vegas allergy specialist can help you regain clear breathing.

What Nasal Polyps Are

Nasal polyps are soft, painless, non-cancerous growths that develop along the lining of the nasal passages or sinuses. They form in response to long-standing inflammation, most often from allergic rhinitis, chronic sinusitis, or asthma. Polyps can range from small enough to be invisible on a routine exam to large enough to block the sinus openings completely. When they grow large, they physically prevent normal mucus drainage, which is why patients often experience the double frustration of chronic congestion plus repeated sinus infections.

Symptoms That Suggest Polyps

Nasal polyps produce a distinctive symptom pattern that overlaps with other sinus problems but has its own signature:

  • Persistent nasal congestion that does not respond to standard allergy medication
  • Reduced or lost sense of smell, and by extension a dulled sense of taste
  • Recurrent sinus infections that keep coming back after antibiotic courses
  • Facial pressure or a heavy feeling around the eyes and forehead
  • Postnasal drip that leads to chronic throat clearing or a nagging cough
  • Snoring or disturbed sleep from mouth breathing at night

Why Polyps Develop

The exact cause of polyp formation is not fully understood, but the pattern is clear. Long-standing inflammation in the nasal lining, whether from environmental allergies, non-allergic rhinitis, chronic sinusitis, or asthma, appears to drive the tissue changes. Certain patient profiles carry higher risk, including adults with asthma, adults with aspirin-exacerbated respiratory disease, and patients whose allergic rhinitis has been undertreated for years. The Tottori conditions we treat list includes allergic rhinitis, non-allergic rhinitis, sinusitis, and nasal polyps together precisely because these conditions frequently coexist.

How Nasal Polyps Are Diagnosed

Diagnosis usually starts with a detailed history and a nasal exam. Larger polyps can be seen with a nasal endoscope, a thin flexible camera that lets the physician see up into the sinus openings. Imaging, typically a CT scan, is used when the picture is unclear or when surgery is being considered. Because most polyp cases have a strong allergic component, an evaluation almost always includes allergy skin testing to identify the specific triggers driving underlying inflammation.

When cough or breathing changes accompany the nasal symptoms, pulmonary function testing and spirometry may be added to check for coexisting asthma. Roughly one in three polyp patients has some form of asthma, so this pairing matters.

Treatment Options

Polyp treatment is a stepped approach. Most patients start with intranasal corticosteroid sprays that reduce inflammation and shrink smaller polyps over weeks. Short courses of oral steroids can shrink larger polyps quickly when needed. Biologic medications targeting specific inflammatory pathways have become an option for severe or recurrent cases. Surgery to remove polyps is reserved for cases that do not respond to medical treatment or where polyps are causing significant complications.

Long-term management, however, is about controlling the underlying inflammation so polyps do not simply grow back. This is where the allergy piece becomes central. When environmental allergies are the driver, immunotherapy allergy shots can reduce the immune reactivity that feeds polyp formation. The starting immunotherapy guide explains the timeline and expectations.

The Connection to Asthma and Sinusitis

Nasal polyps rarely exist in isolation. They frequently accompany chronic sinusitis and asthma, forming what physicians call the united airway. Treating one condition without addressing the others often leads to incomplete relief. Our posts on allergies and sinus infections, what is the connection and when sneezing turns serious, signs your allergies could be affecting your sinuses explore these links in more detail.

Aspirin-Exacerbated Respiratory Disease and Other Polyp Patterns

A specific subgroup of polyp patients has what is called aspirin-exacerbated respiratory disease, or AERD. These patients typically have the combination of nasal polyps, asthma, and reactions to aspirin or other nonsteroidal anti-inflammatory drugs like ibuprofen. Recognizing this pattern is important because standard polyp treatment alone will not manage the aspirin sensitivity, and taking common pain relievers can trigger significant respiratory symptoms. An allergist can identify AERD through history and, in some cases, supervised aspirin challenges.

A separate but related pattern affects patients whose polyps recur quickly after surgical removal. This suggests that the underlying inflammatory driver has not been addressed. In these cases, a full allergy evaluation, careful review of asthma control, and consideration of newer biologic medications targeting the immune pathways behind polyp formation can change the long-term trajectory. Rushing back to a second surgery without addressing the underlying inflammation typically buys only temporary relief.

When to See a Las Vegas Allergist

Consider scheduling an evaluation if congestion has lasted more than 12 weeks, if you have lost sense of smell, or if you have had more than three sinus infections in a year. Dr. David H. Tottori is board certified in Allergy and Immunology plus Pediatrics and has been named a Las Vegas Top Doctor every year since 2000. The practice has two convenient locations, the West office on Cheyenne and the East office on Charleston. Call 702.240.4233 for the West office, 702.432.8250 for the East, or request an appointment online to get a real answer about what is driving your congestion.