Symptom guide
Reverse Sneezing in Dogs: Causes, When to Worry, What to Do
Also called Paroxysmal respiration, Backward sneezing, Snorting fits
Reverse sneezing is a burst of loud, snorting inhales caused by irritation at the back of the nose and throat. It looks and sounds alarming, but an episode usually passes on its own within seconds to a minute or so, and your dog acts normal afterward. Have a vet check the first episode, and see one promptly if episodes become frequent or long, or if you notice trouble breathing, weakness or nasal discharge.
Go to a vet now if…
- Your dog cannot catch their breath, or you think they may be choking
- An episode keeps going for more than a few minutes
- The tongue or gums look blue or purple
- Breathing stays fast, labored or noisy after the episode ends
- Your dog seems weak or unwell between episodes
- There is nasal discharge along with the episodes
- The sound is a honking cough rather than snorting inhales, which can point to a different airway problem
Call ahead so the clinic can prepare. Suspected poisoning in the US: ASPCA (888) 426-4435 · Pet Poison Helpline (855) 764-7661.
What it usually means
In a normal sneeze, air shoots out through the nose. In a reverse sneeze, it is the opposite: your dog pulls air in through the nose in a series of rapid, loud snorts. Dogs usually stand still with the neck stretched out and the head tipped back, sometimes with the elbows pointing outward. The sound can resemble snorting or gagging, and many owners fear their dog is choking or struggling to breathe.
The trigger is irritation in the area behind the nose and above the soft palate, which sets off a reflex. It may be the body's way of clearing dust, allergens or other irritants. Episodes typically last a few seconds to a minute, and your dog seems perfectly normal before and after. Any dog can have them, but they are reported more often in dogs under about 33 lb (15 kg) and in flat-faced breeds. In many dogs no cause is ever found.
Reverse sneezing should not be confused with the honking cough of a collapsing trachea, which is a different and more serious problem. If you are unsure which you are hearing, a video for your vet helps. See also our page on coughing.
Common causes
| Cause | What it means | Urgency |
|---|---|---|
| Dust, pollen and other irritants | Particles in the nose or back of the throat can set off the reflex, which may help clear them. | Often minor |
| Perfume, cleaners, smoke and air fresheners | Strong scents and sprays turn up often in affected dogs' histories. | Often minor |
| Excitement | Episodes often follow a burst of excitement or play. | Often minor |
| Pulling on the leash | Pressure on the neck from a hard pull can trigger an episode. | Often minor |
| Eating or drinking too fast | Gulping can irritate the throat. | Often minor |
| Allergies | Allergic irritation of the nose and throat is a possible trigger. | Often minor |
| Elongated soft palate | Common in flat-faced breeds. It can cause episodes and other breathing trouble. | Call your vet |
| Nasal mites | A parasite that irritates the nasal passages. | Call your vet |
| Plant material or another foreign object | A seed or grass blade in the nose or throat can cause repeated episodes. | See a vet now |
| Infection, polyps or masses | Viral, bacterial or fungal infection, or a growth, can irritate the airway and cause frequent episodes. | See a vet now |
What you can do at home
Stay calm, because your dog will take cues from you. Most episodes end on their own, but a few gentle moves may speed things along.
Stroke or lightly massage your dog's throat. Some vets suggest briefly covering the nostrils, which encourages swallowing, or giving a small, gentle puff of air in the face. Moving to cooler, fresher air helps if you think a scent or dust started the episode. Wait for your dog to breathe out through the nose, which usually ends it.
If you can do so safely, record a video of an episode. It is very useful at the vet, since the sound is hard to describe.
Afterward, make a note of what happened just before: excitement, a leash pull, a meal, a cleaning product. Patterns show up quickly.
Do not give antihistamines or other medicine on your own. If episodes come often or seem allergy-related, your vet may suggest treatment. And if your dog seems to be struggling, call your vet or an emergency clinic right away.
What happens at the vet
Diagnosis starts with your story and the video. Your vet will ask about timing, triggers, seasonal patterns, new products in the home and the chance your dog swallowed or inhaled something. After a physical exam, they decide how far to look.
The main job is ruling out lookalikes and causes that need treatment: an upper respiratory infection, collapsing trachea, nasal tumors or polyps, and objects lodged in the nose or mouth. Depending on what the exam shows, tests can include blood work, chest X-rays, a sedated exam of the mouth and throat, and rhinoscopy, a small camera look inside the nose.
Most dogs need no treatment, because episodes are short, infrequent and harmless. If they are frequent or severe, your vet may try treating for allergies or nasal mites to see whether things improve. If an elongated soft palate is causing real breathing trouble, surgery to shorten it can help.
The outlook is excellent for most dogs, even when no specific cause is found.
Prevention
Because many cases have no identifiable cause, prevention mostly means trimming back the triggers you can control. Watch for patterns. Common ones are excitement, pulling hard on the leash, gulping food or water, and exposure to dust, pollen, smoke, perfume, air fresheners and strong cleaning products.
Keep scented sprays and harsh cleaners away from the rooms where your dog spends time. If your dog gulps food or water, slowing them down may help. Calm greetings and good leash manners can take pressure off the throat.
When allergies seem to be behind the episodes, managing them with your vet's help can reduce how often they happen. Never start a medicine without checking first.
If you have a flat-faced breed, ask your vet to check the soft palate and airway at a routine visit, particularly if episodes are frequent or your dog has noisy breathing at other times. Your vet can tell whether the airway itself is part of the problem.
And keep that video handy for the next checkup.
Frequently asked questions
Is reverse sneezing dangerous?
Usually not. Dogs seem normal before and after an episode, and serious complications are very rare. Have a vet confirm what it is the first time, and call sooner if there are other signs such as trouble breathing, weakness or nasal discharge.
How long does reverse sneezing last?
Most episodes last a few seconds to about a minute. Longer ones are uncommon, and one that keeps going for several minutes, or leaves your dog struggling to breathe, needs a vet.
How do I stop my dog's reverse sneezing?
Stay calm, stroke the throat gently, briefly cover the nostrils, or give a light puff of air in the face so your dog swallows. Many episodes end on their own whatever you do.
How can I tell reverse sneezing from a collapsing trachea?
Reverse sneezing involves rapid, snorting inhales and the dog looks normal afterward. A collapsing trachea tends to make a loud honking cough. They can sound alike to an owner, so show your vet a video.
Why does my dog reverse sneeze so much?
Triggers include excitement, leash pulling, gulping food or water, allergens and strong scents. Frequent episodes deserve a vet visit to check for allergies, mites, an elongated soft palate or a foreign object.
Written from veterinary sources by the Pawsplained editorial team. Not yet reviewed by a veterinarian; this is general information, not a diagnosis or treatment plan. Updated Oct 30, 2026. Editorial policy
Sources
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