Backwards Sneeze in Dogs: Video Guide to Reverse Sneezing
Watch and understand backwards sneeze in dogs with our science-based video guide.
What Is a Backwards Sneeze in Dogs?
A backwards sneeze (medically called paroxysmal respiration or reverse sneezing) is a sudden, involuntary spasm of the soft palate and throat that causes a dog to rapidly inhale air through the nose, producing a loud snorting or honking sound. If you've ever searched for a backwards sneeze in dogs video, you've likely seen dogs standing with their neck extended, elbows spread, making repeated forceful snorting noises that can last from a few seconds to over a minute.
The quick verdict: Reverse sneezing is almost always harmless. It is not choking, it is not a seizure, and it does not require emergency intervention in the vast majority of cases. Episodes typically resolve on their own within 30 seconds to 2 minutes.
The Science Behind Reverse Sneezing: What's Actually Happening
Physiological Mechanism
During a normal sneeze, air is forcefully expelled through the nose and mouth to clear irritants from the nasal passages. A backwards sneeze reverses this process entirely. Here is the step-by-step physiological cascade:
- Irritation trigger: Something stimulates the nasopharynx — the area where the nasal cavity meets the throat. Common irritants include dust, pollen, perfume, sudden temperature changes, or even excitement-induced rapid breathing.
- Soft palate spasm: The soft palate (the fleshy extension at the back of the roof of the mouth) becomes irritated and spasms, partially narrowing the airway at the pharynx.
- Involuntary inhalation reflex: Instead of the expiratory reflex of a normal sneeze, the dog's body triggers rapid, forceful inhalations through the nose. The glottis opens and closes rapidly.
- Audible snorting: Air pulled rapidly through the narrowed nasopharynx creates the characteristic honking or snorting sound that alarms so many owners watching a backwards sneeze in dogs video for the first time.
- Self-resolution: The spasm typically exhausts itself within seconds. Swallowing or a change in breathing pattern resets the soft palate to its normal position.
According to the Merck Veterinary Manual, reverse sneezing is classified as a form of paroxysmal respiration — a sudden, episodic respiratory event that is distinct from coughing, gagging, or true respiratory distress.
The key anatomical structures involved include the soft palate, the pharyngeal muscles, and the vagus nerve (cranial nerve X), which innervates much of the throat and coordinates the reflex arc. When the nasopharyngeal mucosa is irritated, sensory signals travel via the trigeminal nerve to the brainstem, which then triggers the motor response — but instead of the coordinated expiratory burst of a normal sneeze, the motor output produces rapid inspiratory efforts.
Evolutionary Context: Why Does This Reflex Exist?
Ancestral Origins of the Nasopharyngeal Reflex
The nasopharyngeal reflex that produces reverse sneezing is not unique to domestic dogs — it is shared across many mammalian species, including wolves, foxes, and even humans (where it manifests as the much less dramatic "pharyngeal sniff reflex").
In ancestral canids, this reflex likely served a practical purpose: clearing debris from the nasal passages during ground-level foraging and hunting. Wolves and wild canids spend enormous amounts of time with their noses close to the ground, tracking scent through soil, leaf litter, snow, and dense vegetation. The ability to rapidly draw air inward through the nose could help dislodge particles trapped in the upper nasal cavity that a normal outward sneeze might not reach.
The reflex may also relate to the vomeronasal organ (Jacobson's organ), which sits in the roof of the mouth behind the front teeth. Rapid inward airflow could theoretically help draw scent molecules toward this organ during intense scent investigation — though this remains a hypothesis rather than a proven function.
Modern domestic dogs retain this reflex, but the environments they live in — heated homes, carpeted floors, scented candles, air fresheners, and seasonal allergens — present a very different set of nasopharyngeal irritants than those encountered by their wild ancestors. This mismatch may partly explain why reverse sneezing seems so common in pet dogs.
Why Do Dogs Reverse Sneeze? Common Triggers
Understanding what triggers a backwards sneeze helps you reduce episode frequency and recognize when a pattern might warrant veterinary attention. Based on clinical observations and veterinary literature, the most common triggers include:
| Trigger Category | Specific Examples | Frequency |
|---|---|---|
| Environmental irritants | Dust, pollen, mold spores, cigarette smoke, perfume, air fresheners, cleaning products | Very common |
| Excitement/exercise | Greeting owners, leash-pulling, vigorous play, rapid drinking | Very common |
| Temperature changes | Going from warm house to cold outdoors, drinking cold water | Common |
| Mechanical irritation | Pulling against a collar, tight harnesses, eating too fast | Common |
| Allergies | Seasonal allergies, food sensitivities causing nasal inflammation | Moderate |
| Nasal mites | Pneumonyssoides caninum infestation | Uncommon (regional) |
| Elongated soft palate | Anatomical abnormality, especially in brachycephalic breeds | Breed-dependent |
Breed Variations: Which Dogs Are Most Prone?
While any dog can experience reverse sneezing, certain breeds and anatomical types show significantly higher prevalence:
Brachycephalic breeds (short-nosed dogs) are the most prone group. Breeds including French Bulldogs, English Bulldogs, Pugs, Boston Terriers, Shih Tzus, and Boxers have anatomically compressed nasal passages and often have elongated soft palates — the very structure that spasms during a reverse sneeze. In these breeds, reverse sneezing can be more frequent and sometimes more intense due to the already-narrowed airway.
Small and toy breeds are also overrepresented. Chihuahuas, Yorkshire Terriers, Pomeranians, Dachshunds, and Miniature Pinschers experience reverse sneezing at higher rates than larger breeds. The reason is likely related to their proportionally smaller tracheal diameter and more reactive nasopharyngeal tissues.
Terriers of various sizes — Jack Russell Terriers, Rat Terriers, Fox Terriers — also appear frequently in clinical reports of reverse sneezing, possibly related to their high-energy temperaments and tendency toward excitement-triggered episodes.
Large-breed dogs like Labrador Retrievers, German Shepherds, and Golden Retrievers can certainly reverse sneeze, but episodes tend to be less frequent and shorter in duration compared to small and brachycephalic breeds.
How to Help Your Dog During a Reverse Sneezing Episode
Step-by-Step Response Guide
Most reverse sneezing episodes resolve without any intervention. However, if you want to help shorten an episode, here are evidence-supported techniques:
- Stay calm. Your dog can sense your anxiety. A reverse sneeze looks and sounds alarming, but your dog is not in danger during a typical episode.
- Gently massage the throat. Lightly stroke the front of your dog's neck in a downward motion. This can stimulate swallowing, which resets the soft palate position.
- Briefly cover the nostrils. Gently placing your hand over both nostrils for 1-2 seconds causes the dog to open its mouth and swallow, which typically ends the spasm. Do not block the airway for more than a couple of seconds.
- Offer a small drink of water. If the episode persists beyond 30 seconds, offering water can trigger the swallowing reflex.
- Change the environment. Move to a different room, step outside, or simply redirect your dog's attention with a calm voice or treat.
What NOT to do: Never put your fingers inside your dog's mouth during a reverse sneeze — you risk being bitten by an involuntary jaw clamp. Do not shake, startle, or punish your dog during an episode. Avoid blowing air directly into your dog's face, as this can worsen the irritation.
Reverse Sneezing vs. Other Respiratory Events: A Comparison
One reason owners search for backwards sneeze in dogs videos is to confirm that what they witnessed was actually reverse sneezing and not something more serious. Here is a comparison table to help you distinguish between common respiratory events:
| Feature | Reverse Sneeze | Coughing | Tracheal Collapse | Choking |
|---|---|---|---|---|
| Airflow direction | Inhalation (inward) | Exhalation (outward) | Both, with honking | Variable, distressed |
| Sound | Snorting, honking, repeated rapid sniffs | Hack, gag, wet or dry cough | Goose-honk cough | Gagging, retching, distress sounds |
| Posture | Neck extended, elbows spread, standing still | Varies, may hunch | Often during excitement/exercise | Pawing at mouth, frantic |
| Duration | 10 seconds to 2 minutes | Variable, may persist | Chronic, triggered by activity | Until object is cleared |
| After episode | Dog returns to normal immediately | May continue, lethargy possible | May have exercise intolerance | May have oral trauma |
| Urgency | Low — monitor | Moderate if persistent | Veterinary diagnosis needed | Emergency |
Common Misconceptions About Reverse Sneezing
| Myth | Fact |
|---|---|
| "My dog is choking and can't breathe" | During a reverse sneeze, your dog is actively pulling air in — they are breathing, just noisily. Oxygen exchange continues normally. |
| "Reverse sneezing means my dog has allergies" | Allergies can be one trigger among many. Many dogs with no allergy diagnosis experience occasional reverse sneezing due to excitement or temperature changes alone. |
| "I need to perform the Heimlich maneuver" | Never perform abdominal thrusts on a reverse-sneezing dog. There is no obstruction to dislodge, and you risk internal injury. |
| "It's contagious to other dogs" | Reverse sneezing is a mechanical reflex, not an infectious process. It cannot be transmitted between dogs. |
| "My dog will outgrow it" | Some puppies reverse sneeze more frequently and decrease with age, but many dogs continue to have occasional episodes throughout life. This is normal. |
| "It's the same as kennel cough" | Kennel cough (Bordetella bronchiseptica infection) produces a persistent outward cough, often with nasal discharge and lethargy. Reverse sneezing is a brief, self-resolving inhalation spasm with no infectious cause. |
When Reverse Sneezing Signals a Problem
When to Consult Your Veterinarian
While reverse sneezing is overwhelmingly benign, certain patterns warrant professional evaluation. Consult your veterinarian if you observe any of the following:
- Frequency escalation: Episodes increase from occasional (1-2 per month) to daily or multiple times per day
- Duration increase: Individual episodes consistently last longer than 2-3 minutes
- Color changes: Gums or tongue turning blue or purple during or after an episode (cyanosis — this is an emergency)
- Exercise intolerance: Your dog tires quickly, collapses, or refuses activity they previously enjoyed
- Nasal discharge: Bloody, purulent (pus-like), or persistent nasal discharge accompanying reverse sneezing episodes
- Facial swelling or deformity: Could indicate a nasal tumor, abscess, or foreign body
- First episode in a senior dog: New-onset reverse sneezing in dogs over 8 years old should be evaluated, as nasal polyps, tumors, or dental disease can mimic the reflex
- Post-episode collapse: If your dog faints or seems disoriented after an episode, this may indicate a cardiac or neurological issue rather than simple reverse sneezing
Your veterinarian may perform a physical exam, nasal endoscopy (rhinoscopy), dental radiographs, or CT imaging of the nasal cavity. Expect diagnostic costs ranging from $150 for a basic exam to $800-$1,500 for advanced imaging, depending on your region and the tests required.
How Is Reverse Sneezing in Dogs Different From Humans?
Humans do experience a mild analogue — the pharyngeal sniff reflex — but it is far less dramatic than what dogs experience. The key differences stem from anatomy:
- Soft palate proportions: Dogs have a proportionally longer soft palate relative to their airway diameter, especially brachycephalic breeds. This makes the structure more prone to spasm.
- Nasal cavity complexity: Dogs have intricate turbinate structures in their nasal cavities (designed for scent processing) that create more surface area for irritation and more complex airflow dynamics.
- Vomeronasal organ: Dogs possess a functional Jacobson's organ that humans largely lack, adding another sensory structure to the nasopharyngeal region.
- Voluntary control: Humans can typically suppress or modify the sniff reflex consciously. Dogs have less cortical override of brainstem reflexes in this region.
- Sniffing behavior: Dogs use rapid, forceful inhalation as a primary sensory behavior (investigative sniffing involves 4-7 rapid sniffs per second). This habitual airflow pattern may prime the nasopharynx for the reverse sneeze reflex when irritants are present.
Related Behaviors and Cross-References
Understanding reverse sneezing fits into a broader picture of canine respiratory and sensory behaviors. Related topics you may want to explore include:
- Brachycephalic Obstructive Airway Syndrome (BOAS): A collection of anatomical abnormalities in flat-faced breeds including stenotic nares, elongated soft palate, and everted laryngeal saccules — all of which can increase reverse sneezing frequency
- Tracheal collapse: A progressive condition (most common in small breeds like Yorkshire Terriers and Pomeranians) where the tracheal cartilage weakens, producing a goose-honk cough that owners sometimes confuse with reverse sneezing
- Stertor and stridor: Noisy breathing sounds caused by upper airway obstruction — these are clinically distinct from reverse sneezing and always warrant veterinary evaluation
- Canine scent-processing behavior: The rapid sniffing pattern dogs use during scent investigation is related to the same airflow mechanics that produce reverse sneezing
- Nasal mites (Pneumonyssoides caninum): A parasitic cause of chronic reverse sneezing and nasal discharge, more common in certain regions and in dogs with outdoor/kennel exposure
Frequently Asked Questions
Is reverse sneezing normal in dogs?
Yes. Occasional reverse sneezing is considered a normal physiological reflex in dogs. Studies and veterinary consensus indicate that a majority of dogs will experience at least one episode in their lifetime, and many dogs have occasional episodes throughout their lives without any underlying disease. According to the American Kennel Club, reverse sneezing is one of the most common reasons owners bring their dogs to emergency clinics unnecessarily — the episode looks alarming but is almost always benign.
Can dogs control when they reverse sneeze?
No. Reverse sneezing is an involuntary reflex, similar to a hiccup or a normal sneeze. Your dog cannot choose to start or stop an episode. The reflex arc runs through the brainstem and does not involve conscious cortical control.
How do dogs process scent in a way that relates to reverse sneezing?
Dogs use a specialized sniffing pattern — rapid, shallow inhalations at a rate of 4-7 per second — to draw odor molecules into the nasal cavity where they contact the olfactory epithelium. This rapid inhalation behavior uses the same anatomical structures (nasopharynx, soft palate) involved in reverse sneezing. When irritants are present during intense sniffing, the nasopharyngeal reflex can be triggered.
What does it mean when my dog reverse sneezes every day?
Daily reverse sneezing may indicate a chronic irritant in your dog's environment (such as a scented candle, air freshener, or seasonal allergen), an underlying anatomical issue (elongated soft palate, nasal polyps), or a condition like nasal mites or chronic rhinitis. If daily episodes persist for more than 2 weeks, schedule a veterinary appointment for evaluation.
Can I record a backwards sneeze in dogs video to show my vet?
Absolutely — and this is excellent advice. Recording a video of the episode on your phone is one of the most helpful things you can do. Since reverse sneezing episodes are brief and often resolve before you reach a clinic, a clear video allows your veterinarian to confirm the diagnosis and rule out other conditions like tracheal collapse or cardiac cough. Try to capture your dog's full body, face, and the sound clearly.
Is reverse sneezing dangerous for brachycephalic breeds?
In most cases, individual episodes are not dangerous even for flat-faced breeds. However, brachycephalic dogs already have compromised airways, and frequent or prolonged reverse sneezing episodes can add respiratory stress. If your French Bulldog, Pug, or Bulldog has daily episodes, episodes lasting over 2 minutes, or episodes accompanied by blue-tinged gums, consult your veterinarian promptly. Surgical correction of an elongated soft palate or widened nostrils may be recommended to improve overall airway function.
Tom Renshaw
All our authors care for dogs every day — read more of their work on the authors page.
