Does Your Dog Have Nasal Polyps?
Usually benign but always worth checking. Here's what nasal polyps are and why a proper diagnosis matters.
- What does a nasal polyp actually look like and do?
- What are the symptoms of nasal polyps in dogs?
- What causes nasal polyps and how do vets diagnose them?
- Nasal polyp vs. nasal tumor: why this distinction matters
- How are nasal polyps treated and what about recurrence?
- Does pet insurance cover nasal polyps in dogs?
- Before we go
- Frequently Asked Questions
If your dog has been snoring louder than usual, sneezing constantly, or breathing with a rattling, congested sound, you’ve probably spent some time Googling at odd hours trying to figure out what’s going on. One thing that might have come up: nasal polyps. They sound intimidating, but here’s the short version: nasal polyps in dogs are usually benign (non-cancerous) growths that form inside the nasal passages or just behind the soft palate, and they block airflow enough to cause all those noisy, uncomfortable symptoms.
The catch is that nasal polyps share symptoms with more serious conditions, including nasal tumors, which means they always warrant a vet workup.
TL;DR
- Nasal polyps in dogs are usually benign growths that block airflow and cause chronic congestion, noisy breathing, one-sided discharge, sneezing, and reverse sneezing.
- They’re less common in dogs than in cats, and the exact cause often traces back to chronic inflammation or infection.
- Diagnosis involves rhinoscopy (a camera examination of the nasal passages), a CT scan, and a biopsy to confirm the growth is benign, not cancerous.
- Surgical removal is the main treatment, though recurrence is possible if the underlying inflammation isn’t also addressed.
- Because polyps and nasal tumors look similar on the surface, one-sided nasal signs should always be evaluated by a vet sooner rather than later.
What does a nasal polyp actually look like and do?
A nasal polyp is a soft, fleshy growth that forms on the lining of the nasal passages or in the space behind the soft palate that connects the nasal cavity to the throat. These growths are almost always benign, meaning they don’t invade surrounding tissue or spread elsewhere. But they do grow large enough to block airflow, which is where the trouble starts.
Nasal polyps are more common in cats than in dogs, but they do occur in dogs, particularly those with a history of chronic respiratory infections or long-term nasal inflammation. Any breed can be affected.
What are the symptoms of nasal polyps in dogs?
The signs are easy to spot because they show up in how your dog breathes and behaves:
- Chronic nasal congestion: Your dog sounds stuffed up all the time, not just occasionally.
- Noisy breathing (stertor): A low, snoring-like sound caused by airflow being partially blocked in the upper airway.
- One-sided nasal discharge: Mucus or even blood coming from just one nostril. This is a meaningful clue for vets.
- Sneezing or reverse sneezing: Frequent sneezing, or those alarming episodes where your dog seems to inhale in rapid, honking bursts.
- Mouth breathing: Your dog prefers to breathe through their mouth rather than their nose.
- Pawing at the face: A sign of discomfort or pressure around the nose and sinuses.
- Reduced interest in sniffing: Dogs with significant blockage may lose interest in tracking scents or sniffing food.
One-sided symptoms are a particular flag. When signs show up on only one side, vets take that seriously because it can point to a localized growth, whether benign or not.
What causes nasal polyps and how do vets diagnose them?
The exact cause isn’t always clear, but chronic inflammation and repeated infections are the most common contributing factors. When the nasal lining is irritated over a long period, tissue can overgrow and form polyps. Allergies, foreign bodies lodged in the nasal passages, or long-term bacterial or fungal infections can all create that kind of persistent inflammation.
Because nasal symptoms have several possible causes, your vet will likely use a combination of tools:
| Diagnostic step | What it involves |
|---|---|
| Rhinoscopy | A thin, flexible camera is guided into the nasal passages so the vet can look directly at the tissue. Usually the most informative step for spotting polyps. |
| CT scan | A detailed imaging scan that gives the vet a cross-sectional view of the nasal cavity and surrounding structures, helping to map the size and location of any growth. |
| Biopsy | A small tissue sample is taken from the growth and sent to a lab to confirm whether it’s a benign polyp or something more concerning. This step is non-negotiable. |
Nasal polyp vs. nasal tumor: why this distinction matters
This is the most important thing to understand if your dog has chronic, one-sided nasal signs.
Nasal polyps and nasal tumors can look nearly identical from the outside. Both can cause one-sided discharge, noisy breathing, sneezing, and nasal obstruction. The difference is that nasal tumors, including cancers of the nasal lining, invade surrounding bone and tissue and carry a very different prognosis than a benign polyp.
This is why a biopsy isn’t optional. Imaging can suggest that a growth looks benign, but only tissue analysis can confirm it. Waiting on that answer, or skipping the workup because symptoms seem mild, is the one thing you don’t want to do.
The reassuring part: polyps are far more common than nasal tumors in otherwise healthy dogs, and most dogs who go through a proper diagnostic workup get a benign result.
How are nasal polyps treated and what about recurrence?
The standard treatment is surgical removal. Your vet will remove the polyp during a procedure often guided by the rhinoscopy camera to clear the nasal obstruction and restore normal airflow. Recovery is usually straightforward, and your dog may need a short course of anti-inflammatory medication or antibiotics afterward.
Recurrence is a real possibility, and it’s the part owners sometimes aren’t prepared for. If the inflammation or infection that triggered the polyp in the first place isn’t fully treated, the tissue can regrow. Your vet may recommend treating any underlying allergies, infections, or chronic inflammation alongside the surgical removal to reduce that risk. Follow-up check-ins after surgery are important, so don’t skip them even if your dog seems completely back to normal.
Does pet insurance cover nasal polyps in dogs?
Yes, nasal polyps are eligible for coverage under a Lemonade Pet accident and illness policy, as long as the condition isn’t pre-existing. That means your dog shouldn’t be showing any signs or symptoms before your policy starts or during your waiting period.
Rhinoscopy, CT imaging, biopsy, and surgery together can add up quickly before treatment even begins. Getting coverage in place while your dog is healthy is what makes it actually useful when you need it.
Before we go
Nasal polyps in dogs are usually benign and treatable, but they need a proper diagnosis to rule out something more serious. If your dog has chronic congestion, noisy breathing, one-sided discharge, or persistent sneezing, those symptoms deserve a vet visit rather than a wait-and-see approach. The sooner you get a clear picture of what’s going on, the sooner your dog can breathe easier. And if your dog is currently healthy, now is a good time to get coverage in place before something changes.
Frequently Asked Questions
Are nasal polyps in dogs cancerous?
No, nasal polyps are almost always benign growths, meaning they don’t spread or invade surrounding tissue. However, because nasal tumors share many of the same symptoms, a biopsy is essential to confirm the diagnosis before treatment.
What does stertor sound like in dogs?
Stertor is a low, snoring, or rattling sound that comes from the upper airway when airflow is partially blocked. It’s different from stridor, which is higher-pitched and comes from the lower airway. If your dog sounds congested and snore-y even when awake, stertor is a likely culprit.
How much does nasal polyp removal cost for dogs?
Costs vary depending on your location and the complexity of the case, but rhinoscopy, CT imaging, biopsy, and surgical removal together can run into the thousands. Pet insurance enrolled before symptoms appear may help cover eligible costs.
Can nasal polyps come back after surgery?
Yes, recurrence is possible, especially if the underlying inflammation or infection that caused the polyp isn’t fully treated alongside the surgery. Your vet will likely recommend follow-up care and monitoring to catch any regrowth early.
How do vets tell the difference between a nasal polyp and a nasal tumor?
Imaging like a CT scan can give useful clues, but a biopsy, where a small tissue sample is sent to a lab, is the only way to confirm whether a nasal growth is benign or cancerous. Vets will almost always recommend a biopsy before finalizing any treatment plan.
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