By Dr Duncan Houston
A sudden burst of loud snorting can look as though your dog is choking. Reverse sneezing often explains this sound, but the noise alone cannot tell you whether breathing is safe.
The key distinction is whether this is a brief episode followed by complete recovery, or a dog who continues to struggle for air. If breathing looks difficult now, seek urgent veterinary help.
Quick Answer
Reverse sneezing is a series of forceful inward snorts, usually with the mouth closed and neck stretched. An occasional brief episode with an immediate return to normal is usually harmless. Keep your dog calm, leave the nose and mouth unobstructed, and ask your vet about new or changing episodes. Persistent breathing effort, blue gums, weakness or collapse requires emergency care.
What does reverse sneezing look like?
The dog usually stands still and repeatedly draws air inward through the nose. The neck may extend and the elbows move outward. Irritation behind the nose can trigger this reflex; it is different from an ordinary sneeze, which pushes air outward. Cornell explains the characteristic reverse sneezing pattern.
Episodes commonly last seconds to about a minute, although longer ones occur. In a classic uncomplicated episode, the dog is normal again afterward. Duration alone is not a safety test. A dog struggling to breathe needs help even if the problem began only seconds ago. VCA describes the usual duration and recovery.
What can trigger it?
Dust, pollen, strong odors, excitement, leash pressure, or eating and drinking quickly can precede episodes. Sometimes no trigger is found. Less straightforward causes include nasal inflammation, infection, plant material, nasal mites or a mass. These possibilities matter more when signs are new, persistent or accompanied by discharge.
Any dog can reverse sneeze. Small and flat-faced dogs are reported more often, but breed does not establish the diagnosis. Cornell lists recognized triggers and underlying conditions.
How urgently does your dog need help?
| What you see | What it means | What to do and when |
|---|---|---|
| Occasional familiar episode, then comfortable breathing and usual behavior | Fits an uncomplicated pattern already assessed by your vet | Monitor and record changes; follow the existing veterinary plan. |
| First unfamiliar episode, now completely recovered | The sound still needs identification | Contact your vet during normal opening hours and share a video if available. |
| Increasing frequency, longer episodes, nasal blood or discharge, cough or reduced appetite | Possible underlying nasal or airway disease | Call your vet today for triage and an examination plan. |
| Ongoing effort between snorts, inability to settle, blue gums, weakness or collapse | Possible respiratory emergency | Go to an emergency veterinary hospital immediately. |
What else can sound similar?
A persistent dry, honking cough can occur with tracheal collapse, especially in small dogs. Coughing and reverse sneezing are different events, but descriptions can overlap. A video and examination are more useful than the word “honking” alone. Cornell describes tracheal collapse and its warning signs.
Flat-faced dogs may have brachycephalic obstructive airway syndrome. Noisy breathing between episodes, difficulty exercising or heat intolerance deserves assessment rather than acceptance as a breed trait. An elongated soft palate is only one possible airway abnormality. Cornell explains breathing problems in flat-faced dogs.
Sudden distress while chewing raises concern about an airway obstruction. Persistent nasal signs may require investigation for foreign material or other nasal disease. Do not assume either is reverse sneezing.
When is this an emergency?
Leave for emergency veterinary care now if your dog cannot breathe comfortably, keeps using the abdomen to breathe after the snorting ends, gasps with an open mouth at rest, develops blue gums, becomes weak or collapses. Do not wait for gum discoloration before acting.
Call ahead if possible. Keep the journey cool and quiet, minimize handling and allow your dog to choose a comfortable position. If you cannot tell whether air is moving adequately, call the emergency clinic immediately while preparing to leave. Cornell's respiratory distress guidance explains the signs and immediate response.
What should you do during and after an episode?
- Pause activity. Speak calmly and give your dog space. Remove an obvious spray or smoke source without making your dog exercise.
- Keep the airway clear. Do not cover the nostrils, hold the mouth shut, press or massage the throat, or put fingers into the mouth to stop a suspected reverse sneeze. Do not force food, water or medication during the event.
- Record useful details. Time the episode and, if this does not delay care, film the head and chest. Note what happened immediately beforehand.
- Check recovery. Watch breathing and behavior afterward. An episode that continues beyond the usual pattern, repeats without comfortable recovery, or leaves you uncertain warrants a call now.
Your vet will review the pattern and examine your dog. Persistent or atypical signs may justify imaging or examination inside the nose. Treatment targets the identified problem; a short, uncomplicated episode usually needs no medicine. VCA outlines assessment and treatment decisions.
Common mistakes to avoid
- Using an online video to label every new breathing noise.
- Focusing on the sound while overlooking breathing effort afterward.
- Trying repeated physical tricks when an episode is not settling.
- Giving antihistamines, decongestants or parasite medicines without veterinary direction.
Can you reduce future episodes?
Use your notes to identify repeatable triggers. Avoid smoke and aerosol exposure, and prevent leash pressure on the neck with a well-fitted harness. Keep activities comfortable in hot weather. Dogs with airway disease also benefit from an appropriate weight and individualized exercise plan; these measures support breathing but cannot correct an obstruction. Cornell describes practical airway support measures.
Frequently Asked Questions
Can reverse sneezing stop on its own?
Yes. Typical brief episodes usually resolve without intervention. Check that your dog returns fully to comfortable breathing and normal behavior.
Why has my dog suddenly started reverse sneezing?
A new irritant is one possibility, but repeated new episodes deserve a veterinary assessment. Mention any nasal discharge, outdoor exposure, coughing or appetite change.
Does reverse sneezing mean a collapsed trachea?
No. Tracheal collapse commonly causes a persistent cough and needs its own assessment. The two cannot reliably be distinguished from an owner's description of the sound alone.
Focus on recovery as well as the noise
A familiar brief snorting episode with complete recovery is reassuring. New patterns deserve a check, and ongoing breathing difficulty deserves immediate care. A clear video and simple episode log can help your vet make the next decision.
For support understanding non-emergency breathing concerns, visit ASK A VET™. If your dog is struggling for air, go directly to an emergency veterinary hospital.
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Every ASK A VET article is written and reviewed by qualified veterinarians.
