Dog Reverse Sneezing: What It Is, Causes & When to Worry

What Is Reverse Sneezing?

Reverse sneezing, medically known as paroxysmal respiration or inspiratory paroxysmal respiration, is an involuntary respiratory reflex in dogs. Unlike a regular sneeze where air is forcefully expelled out through the nose, a reverse sneeze involves a rapid, forceful inhalation of air through the nose. It occurs when the soft palate and throat (nasopharynx) become irritated, triggering a spasm.

During a reverse sneezing episode, the muscles of the soft palate go into spasm, temporarily narrowing the tracheal opening. Your dog's body responds by rapidly pulling air in through the nose in an attempt to clear the irritation. The dog typically stands still, extends their neck forward and down, pulls their lips back, and makes loud, repeated snorting or honking sounds. Their chest and abdomen may expand dramatically with each forceful inhalation.

The good news is that reverse sneezing is not painful and is almost never dangerous. While the sound can be genuinely alarming the first time you witness it, especially if you think your dog is choking or having a seizure, the episode is essentially a muscular spasm that resolves on its own. Most episodes last only 15 to 30 seconds, rarely exceeding a minute. After the episode, your dog will typically act completely normal, as if nothing happened.

Reverse sneezing is extremely common and can occur in any breed at any age, though certain breeds are more predisposed. Many dogs will experience at least a few episodes throughout their lives, and for some dogs it becomes a regular occurrence that is simply part of their normal life.

What Does Reverse Sneezing Sound Like?

If you have never witnessed a reverse sneezing episode, the sound can be genuinely startling. Owners often rush to the emergency vet the first time they hear it, convinced their dog is choking, having an asthma attack, or unable to breathe. Here is what to listen for:

The key characteristic is that the sound is rhythmic and repetitive. Your dog will make the same snorting or honking noise over and over in rapid succession, typically at a rate of one to two snorts per second. The episode comes on suddenly and stops just as suddenly. Between the individual snorts, you may hear a brief whistling or wheezing sound as air is pulled through the narrowed nasal passages.

Importantly, your dog will be standing still and breathing through their nose throughout the episode. They are not pawing at their face, not drooling excessively, and not showing signs of panic. Their gums remain a normal pink color. This is one of the clearest ways to distinguish reverse sneezing from a genuine breathing emergency like gagging or choking.

Reverse Sneezing vs Regular Sneezing vs Choking

One of the most important things every dog owner should understand is the difference between reverse sneezing, regular sneezing, and choking. Confusing these can lead to either unnecessary panic or, worse, a failure to act when your dog truly needs emergency help.

Common Causes of Reverse Sneezing in Dogs

Reverse sneezing is triggered by anything that irritates the soft palate, nasopharynx, or the back of the nasal passages. Understanding the triggers can help you reduce the frequency of episodes for your dog. Here are the most common causes:

1. Excitement and Overexcitement

One of the most common triggers for reverse sneezing is simply excitement. When your dog gets overly excited during play, when you come home from work, or when they anticipate a walk or meal, the rapid breathing and increased nasal airflow can irritate the soft palate and trigger an episode. This is especially common in small, excitable breeds. If your dog reverse sneezes primarily during exciting moments, excitement is likely the culprit.

2. Pulling on the Leash

Pressure on the throat from a collar, especially when a dog pulls on the leash during walks, can trigger reverse sneezing. The collar compresses the trachea and throat area, irritating the soft palate. If your dog frequently reverse sneezes during walks, consider switching from a collar to a harness, which distributes pressure across the chest instead of concentrating it on the throat.

3. Allergens and Environmental Irritants

Just like humans, dogs can have their nasal passages irritated by allergens and environmental substances. Common triggers include pollen, dust, mold spores, perfume or cologne, air fresheners, cigarette smoke, cleaning products, scented candles, and cooking fumes. Seasonal patterns in reverse sneezing episodes (more frequent in spring or fall) often point to pollen allergies as the underlying cause.

4. Post-Nasal Drip

Excess mucus dripping from the nasal passages down the back of the throat can irritate the soft palate and trigger reverse sneezing. Post-nasal drip can result from allergies, upper respiratory infections, or changes in weather and humidity. Dogs with chronic post-nasal drip may reverse sneeze more frequently, particularly at night or upon waking up.

5. Elongated Soft Palate (Brachycephalic Breeds)

Brachycephalic (flat-faced) breeds such as Pugs, Bulldogs, and Boston Terriers have an anatomical predisposition to reverse sneezing. Their shortened skulls mean the soft palate is often disproportionately long for the space available, making it more likely to be irritated and to vibrate during breathing. This structural trait, part of brachycephalic obstructive airway syndrome (BOAS), makes reverse sneezing a particularly common occurrence in these breeds.

6. Nasal Mites

Pneumonyssoides caninum, the canine nasal mite, is a tiny parasite that lives in the nasal passages and sinuses of dogs. Nasal mite infestations can cause chronic reverse sneezing, regular sneezing, nasal discharge, and nose rubbing. Dogs typically contract nasal mites through direct nose-to-nose contact with infected dogs. While not as common as other causes, nasal mites should be considered when reverse sneezing is persistent and frequent, especially if multiple dogs in the household are affected.

7. Foreign Bodies

Small objects or plant material such as grass awns, seeds, or bits of foliage that become lodged in the nasal passages or nasopharynx can cause persistent reverse sneezing. This is especially common in dogs that spend a lot of time outdoors sniffing through tall grass or underbrush. A foreign body typically causes unilateral (one-sided) symptoms and may be accompanied by pawing at the nose, sneezing with discharge, or even a bloody nose.

8. Sudden Temperature Changes

Moving quickly between environments with very different temperatures, such as going from a warm house into cold winter air, or from an air-conditioned room into summer heat, can trigger reverse sneezing. The sudden change in air temperature and humidity irritates the nasal passages and soft palate, causing a reflexive spasm.

9. Eating or Drinking Too Fast

Dogs that gulp their food or water quickly may trigger reverse sneezing episodes. Rapid eating or drinking can cause small amounts of food or water to contact the nasopharynx, irritating the soft palate. Using a slow-feeder bowl or puzzle feeder can help reduce this trigger. Some dogs also reverse sneeze immediately after eating due to food particles near the back of the throat.

Most dogs that experience reverse sneezing are perfectly healthy and the episodes are no cause for concern

Which Breeds Are Most Prone to Reverse Sneezing?

While reverse sneezing can occur in any breed, certain dogs are more predisposed due to their anatomy. Small breeds and brachycephalic (flat-faced) breeds are the most commonly affected. Here is a breakdown of the breeds most frequently seen reverse sneezing:

If you own a brachycephalic breed, reverse sneezing may simply be part of your dog's daily life. Regular grooming appointments are a great opportunity for experienced groomers to observe your dog's breathing patterns and alert you to any changes. That said, even in prone breeds, a sudden increase in frequency or severity should prompt a veterinary visit.

What to Do During a Reverse Sneezing Episode

Watching your dog reverse sneeze for the first time can be frightening, but the most important thing you can do is stay calm. Here is a step-by-step guide for helping your dog through an episode:

When to See the Vet

While the vast majority of reverse sneezing episodes are harmless, certain patterns or accompanying symptoms indicate that a veterinary evaluation is warranted. Contact your vet if you notice any of the following:

Frequent or worsening reverse sneezing can sometimes indicate underlying conditions such as nasal mites, nasal polyps, nasal tumors, a foreign body lodged in the nasal passage, or severe allergies. In older dogs, a new onset of reverse sneezing deserves special attention, as nasal tumors become more common with age. Your vet may recommend a physical examination, nasal endoscopy (rhinoscopy), imaging (X-rays or CT scan), or allergy testing depending on the clinical picture.

It is helpful to record a video of your dog during a reverse sneezing episode to show your veterinarian. Since episodes are brief and unpredictable, your vet may never witness one in the exam room. A video helps them confirm that what you are seeing is indeed reverse sneezing and not gagging, a collapsing trachea, or another condition that may look or sound similar.

Treatment and Management

In the majority of cases, reverse sneezing requires no treatment at all. It is a benign reflex that does not harm your dog and does not indicate disease. However, when episodes are frequent or caused by an identifiable underlying condition, there are several management strategies and treatments available:

When No Treatment Is Needed

If your dog has occasional reverse sneezing episodes that resolve quickly and your dog is otherwise healthy, no medical treatment is necessary. Simply learn to recognize the episodes, stay calm when they occur, and use the gentle throat massage or nostril-covering techniques described above to help shorten them. Many dogs live their entire lives with occasional reverse sneezing and never need any intervention.

Antihistamines

If allergies are suspected as the primary trigger, your veterinarian may recommend antihistamines such as diphenhydramine (Benadryl) or cetirizine (Zyrtec). These can help reduce nasal inflammation and the frequency of episodes. Always consult your vet before giving any medication to determine the correct dosage for your dog's size and to ensure there are no contraindications with other medications your dog may be taking.

Removing Environmental Triggers

If you have identified specific triggers for your dog's reverse sneezing, removing or reducing exposure can significantly decrease episodes. Consider the following environmental modifications:

• Switch from collar to harness to eliminate throat pressure during walks
• Use unscented cleaning products and avoid air fresheners, scented candles, or incense around your dog
• Run an air purifier in the rooms where your dog spends the most time, especially during high pollen seasons
• Keep your home well-ventilated and minimize dust accumulation
• Use a slow-feeder bowl if eating or drinking too fast triggers episodes
• Avoid smoking or vaping indoors around your pet
• Transition between temperatures gradually when moving between heated/cooled indoor spaces and outdoors

Humidifier

Dry air can irritate nasal passages and contribute to reverse sneezing. Running a humidifier in your home, particularly during winter months when indoor heating dries the air, can help keep your dog's nasal passages moist and reduce irritation. Aim for a humidity level between 40-60% for optimal comfort.

Treating Underlying Conditions

When reverse sneezing is caused by an identifiable underlying condition, treating that condition will typically resolve or reduce the episodes:

• Nasal mites: Treated with antiparasitic medications such as ivermectin or milbemycin. Treatment is usually straightforward and effective
• Foreign body: Removed under anesthesia via rhinoscopy. Once the object is removed, reverse sneezing should stop
• Nasal polyps: May require surgical removal depending on size and location
• Elongated soft palate: In severe cases, particularly in brachycephalic breeds with significant breathing difficulties, surgical shortening of the soft palate (staphylectomy) may be recommended as part of BOAS correction surgery
• Dental disease: Treating infected teeth can resolve reverse sneezing caused by dental-related nasal irritation

Regular health checkups and professional grooming are important for monitoring your dog's overall respiratory health. Groomers often notice changes in breathing patterns or nasal discharge that owners may miss, and can alert you to potential issues early. Also see our guides on dog eye discharge and dog feeling hot to touch for other common health symptoms to watch for.

Frequently Asked Questions

The Bottom Line

Reverse sneezing is one of the most common and least concerning respiratory events in dogs. While the honking, snorting sounds can be genuinely alarming, especially the first time you witness an episode, rest assured that your dog is not in pain and not in danger in the vast majority of cases. The episode is simply a spasm of the soft palate that resolves on its own, usually within 15 to 30 seconds.

The key is knowing how to tell reverse sneezing apart from genuine emergencies like choking or severe respiratory distress. If your dog is standing still, breathing through their nose, and making rhythmic snorting sounds, it is almost certainly a reverse sneeze. Stay calm, try a gentle throat massage, and let the episode pass. If your dog is pawing at their face, has blue gums, or cannot breathe, that is a different situation entirely and requires immediate veterinary attention.

For dogs that reverse sneeze frequently, identifying and removing triggers, using antihistamines when recommended by your vet, and maintaining good air quality in your home can make a real difference. And if you ever notice a significant change in your dog's reverse sneezing pattern, such as a sudden increase in frequency, longer episodes, or new accompanying symptoms, do not hesitate to schedule a veterinary visit.

Regular professional grooming appointments and wellness checkups are valuable for keeping tabs on your dog's overall health, including their respiratory function. Groomers and vets who see your dog regularly are well-positioned to notice subtle changes that might otherwise go undetected.