Reverse sneezing is almost always harmless. It happens when the soft palate at the back of your dog’s throat spasms briefly, causing a rapid, forceful inhalation through the nose that sounds alarming but resolves on its own within seconds. Most dogs experience it occasionally, and some dogs experience it a lot, depending on their breed, environment, and individual anatomy.
What Reverse Sneezing Looks and Sounds Like
During an episode, your dog will suddenly stand still, extend their neck, and pull air rapidly inward through the nose, producing a loud snorting or honking sound. Their chest and abdomen may expand dramatically with each inhale, and it can look like they’re choking or struggling to breathe. The whole thing typically lasts 10 to 30 seconds, sometimes up to a minute, and then your dog acts completely normal again as if nothing happened.
The mechanics are essentially the opposite of a regular sneeze. A normal sneeze pushes air out through the nose to clear an irritant. A reverse sneeze pulls air in through the nose in short, forceful bursts. The body is trying to do the same thing either way: clear something irritating from the upper airway.
Common Triggers
Reverse sneezing is the body’s reflex response to irritation at the back of the throat or nasal passages. The list of things that can set it off is long:
- Airborne irritants: dust, pollen, perfumes, household chemicals, cigarette smoke, and cleaning products
- Excitement or overexertion: greeting you at the door, playing hard, or panting heavily
- Mechanical pressure on the throat: pulling against a leash, a collar pressing on the windpipe, or tags jangling against the throat
- Eating or drinking too fast: gulping food or water can trigger the reflex
- Foreign material: blades of grass, plant seeds, or other debris caught in the nasal passages
- Post-nasal drip: mucus draining from the sinuses, especially during allergy season
- Temperature changes: moving quickly between cold outdoor air and warm indoor air
If your dog’s episodes seem to cluster around specific situations, like walks in high-pollen areas, meals, or wearing a collar, that pattern is your biggest clue to reducing frequency.
Why Some Breeds Do It More
Flat-faced breeds like Pugs, Bulldogs, Boston Terriers, and Shih Tzus reverse sneeze more often than dogs with longer snouts. Their compressed airways and elongated soft palates mean there’s more tissue in a smaller space, and that tissue is more easily irritated or displaced. Even normal breathing can put enough pressure on the soft palate to trigger an occasional spasm.
Small breeds in general, regardless of face shape, tend to reverse sneeze more frequently than large breeds. Their narrower airways are more sensitive to even minor irritants. If you have a small or flat-faced dog that reverse sneezes a few times a week, that’s well within the range of normal for their anatomy.
How to Help During an Episode
Most episodes end on their own, but you can sometimes shorten them. Gently massage your dog’s throat with light downward strokes. This encourages swallowing, which can reset the soft palate and stop the spasm. You can also briefly cover your dog’s nostrils for just a second or two, which causes them to swallow and often breaks the cycle. Blowing lightly on their face works for some dogs by triggering a swallow reflex.
Stay calm while it’s happening. Your dog is not suffocating, and panicking or restraining them can make the episode last longer by increasing their stress. Speaking softly and keeping still is often the most helpful thing you can do.
Reverse Sneezing vs. More Serious Sounds
The reason this search brings so many worried pet owners online is that reverse sneezing sounds genuinely scary, especially the first time you hear it. It’s worth knowing what it isn’t.
Tracheal collapse produces a persistent, harsh, dry cough often described as a “goose honk.” Unlike reverse sneezing, which comes in brief episodes and then stops completely, tracheal collapse causes coughing that can be triggered just by touching the throat gently. It tends to get worse over time rather than staying at a consistent, occasional frequency.
Kennel cough sounds like a deep, forceful hack, sometimes followed by gagging or producing white foam. It comes with other signs of illness like lethargy, reduced appetite, or a runny nose, and it persists throughout the day rather than occurring in isolated 30-second bursts.
The key distinction: reverse sneezing episodes have a clear beginning and end, your dog is completely fine between them, and there’s no cough, discharge, or change in energy level.
When Frequent Episodes Signal a Problem
Occasional reverse sneezing needs no treatment. But a noticeable increase in frequency or intensity can point to an underlying issue worth investigating.
Allergies are the most common culprit behind chronic reverse sneezing. Seasonal patterns (worse in spring or fall) or episodes that spike after you’ve used a new air freshener or cleaning product point toward an allergic trigger. Your vet can recommend allergy medications that reduce the inflammation driving the episodes.
Nasal mites are a less common but important cause, especially if reverse sneezing is accompanied by nasal discharge, pawing at the face, or nosebleeds. These tiny parasites live inside the nasal passages and are diagnosed by examining the nose with a small camera or flushing the nasal passages and checking the fluid for mites. Many other respiratory conditions produce similar signs, so identifying the mites directly is important before starting treatment.
Nasal foreign bodies, like a grass seed lodged in the nasal passage, cause sudden-onset, persistent reverse sneezing that doesn’t let up the way a typical episode does. If your dog was fine, went outside, and is now reverse sneezing continuously or repeatedly over hours, something may be physically stuck.
Upper respiratory infections can also increase reverse sneezing, usually alongside other symptoms like sneezing (the regular kind), nasal discharge, coughing, or mild fever.
Reducing How Often It Happens
You can often cut the frequency of episodes significantly with a few practical changes. Switch from a collar to a harness to eliminate pressure on the throat during walks. Use a slow-feeder bowl if your dog gulps food or water. Run an air purifier in rooms where your dog spends the most time, and avoid using aerosol sprays, plug-in air fresheners, or scented candles near them.
During high-pollen seasons, wiping your dog’s face and paws with a damp cloth after outdoor time removes irritants before they have a chance to trigger an episode. If your dog reverse sneezes most often when excited, like during greetings or play, that’s simply their anatomy responding to rapid breathing and there isn’t much to change. Those episodes are normal and harmless.
If you’ve addressed obvious environmental triggers and your dog is still reverse sneezing multiple times a day, or if episodes are lasting longer than they used to, a vet visit is worthwhile. Recording a video of an episode on your phone is one of the most useful things you can bring to that appointment, since dogs rarely perform on cue in the exam room.