Reverse Sneezing in Dogs: Causes, What to Do, and When to See a Vet

What Is Reverse Sneezing?

Reverse sneezing, medically called inspiratory paroxysmal respiration, is a reflex triggered by irritation to the soft palate and nasopharynx – the region at the back of the throat where the nasal passages and mouth meet. When this area is irritated, the soft palate spasms and temporarily elongates, partially obstructing the airway above the larynx. The dog responds by rapidly and forcefully inhaling air through the nose in repeated bursts, attempting to clear or move the irritant.

The result is the distinctive sound – a repeated, rapid, forceful snorting or honking – that most owners describe as alarming the first time they hear it. The dog typically stands still during the episode, with its elbows spread out, neck extended, and eyes wide. The episode usually lasts 30 seconds to 2 minutes and ends as abruptly as it began, with the dog returning to normal behavior immediately as if nothing happened.

Normal Sneeze vs Reverse Sneeze

Common Triggers

Reverse sneezing is not a disease – it is a reflex. Identifying and minimizing triggers is the most effective long-term management strategy for dogs that episode frequently.

Breeds Most Prone to Reverse Sneezing

How to Stop an Episode

Most reverse sneezing episodes resolve on their own within 30 to 60 seconds without any intervention. However, if you want to try to shorten or stop an episode, the following techniques are commonly used:

1. Gently massage the throat: Softly stroking the underside of the throat stimulates swallowing, which interrupts the soft palate spasm and often ends the episode.
2. Briefly cover the nostrils: Lightly covering both nostrils with your fingers for 1 to 2 seconds encourages the dog to swallow and breathe through the mouth, which resets the soft palate position.
3. Offer water: A few laps of water often triggers the swallowing reflex and breaks the cycle.
4. Blow gently on the face: A soft puff of air toward the dog’s nose and mouth may trigger a swallow response.
5. Stay calm: Dogs pick up on owner anxiety. Speaking in a calm, reassuring voice and avoiding frantic restraint helps the dog relax, which is often enough to allow natural resolution.

When Reverse Sneezing Needs Veterinary Evaluation

Occasional reverse sneezing episodes in an otherwise healthy dog do not require a vet visit. The following signs indicate that what you are observing may not be simple reverse sneezing, or that an underlying condition is responsible and needs investigation:

• Frequency increasing over weeks: Occasional episodes are normal; daily or multiple-times-daily episodes that are becoming more frequent suggest a persistent irritant or structural problem.
• Nasal discharge: Thick, colored, or bloody discharge from one or both nostrils alongside reverse sneezing episodes suggests infection, foreign body, or nasal mass.
• Nosebleeds: Epistaxis (nosebleed) with or near reverse sneezing episodes is a red flag for nasal tumors, fungal rhinitis, or trauma.
• Facial asymmetry or swelling: Bulging of one side of the face or swelling over the bridge of the nose alongside nasal symptoms suggests a space-occupying nasal lesion.
• Episodes lasting over 2 minutes: True reverse sneezing resolves quickly. Prolonged episodes may represent laryngeal paralysis, tracheal collapse, or other serious airway conditions that require differentiation.
• Breathing difficulty between episodes: Normal dogs are completely normal between reverse sneeze episodes. Any ongoing breathing changes, exercise intolerance, or open-mouth breathing at rest warrant evaluation.

What Vets Look For

When a vet evaluates a dog for reverse sneezing, the history is usually the most important diagnostic tool. Information about when episodes occur, how often, how long they last, and what the dog was doing beforehand helps distinguish benign reverse sneezing from conditions that mimic it or cause it.

Physical examination includes assessment of the upper airways, lymph nodes, and nasal passages. If the history or exam raises concern for a primary nasal problem, further diagnostics may include:

• Rhinoscopy (endoscopic examination of the nasal passages)
• CT scan of the skull and nasal passages (most sensitive for nasal tumors and fungal plaques)
• Nasal cytology or biopsy
• Testing for nasal mites (Pneumonyssoides caninum) if the dog has outdoor exposure and frequent sneezing
• Allergy testing if seasonal or environmental allergen involvement is suspected

Managing Frequent Reverse Sneezing

For dogs that reverse sneeze frequently but have a normal veterinary examination, management focuses on identifying and reducing triggers:

• Switch from neck collar to harness for walks
• Use fragrance-free cleaning products and avoid aerosol sprays near the dog
• Run an air purifier with a HEPA filter in areas where the dog spends most time
• Feed from a slow-feeder bowl to reduce gulping and eating-triggered episodes
• Manage seasonal allergies if identified – antihistamines or Cytopoint may reduce post-nasal drip
• Keep the dog’s sleeping area vacuumed and low in dust
• Avoid second-hand smoke exposure

Brachycephalic dogs with severe or daily reverse sneezing may benefit from surgical correction of anatomical abnormalities (soft palate resection, nares widening) if brachycephalic obstructive airway syndrome is contributing. This is a decision made in consultation with a veterinarian familiar with the individual dog’s anatomy and symptom severity.

Frequently Asked Questions