The first time a French Bulldog reverse sneezes, it’s alarming. Your dog stands still, stretches their neck out and pulls air in through the nose in rapid, loud snorts, as if they can’t breathe. Then it stops, and they carry on as if nothing happened.

Usually, nothing did. Reverse sneezing is common, especially in flat-faced breeds, and in an otherwise healthy dog it isn’t harmful. Here’s what’s going on, how to help, and when it’s worth a vet visit.

What reverse sneezing is

A normal sneeze pushes air out through the nose. A reverse sneeze pulls it in, rapidly and repeatedly, which is why vets also call it paroxysmal respiration. Your dog makes a snorting or honking sound and seems to be trying to inhale while sneezing. Most episodes last less than a minute (VCA Animal Hospitals).

It is triggered by irritation to the nose, sinuses or back of the throat, and it isn’t known to harm dogs that don’t have an underlying condition such as heart disease (AKC).

Why French Bulldogs do it more

Reverse sneezing affects all kinds of dogs but is more common in small and flat-faced breeds (AKC). An elongated soft palate, one of the features of brachycephalic obstructive airway syndrome (BOAS), is itself a recognized trigger (VCA Animal Hospitals). Many Frenchies have one.

Common triggers

  • Irritants in the air: dust, pollen, smoke, strong smells and cleaning products.
  • Something inhaled, such as a grass seed.
  • Allergies.
  • Excitement, such as greeting visitors or the lead coming out for a walk.
  • Pressure on the throat from pulling against a collar.
  • Nasal mites, which are less common but worth ruling out if episodes are frequent (CAPC).

Watch what happens just before an episode and you’ll often spot a pattern.

Charlie as a puppy, sitting among pink wildflowers on a leash

How to help during an episode

Most episodes stop on their own. If you want to help, stay calm, since your dog takes their cue from you, and try one of these:

  1. Gently stroke your dog’s neck or head to settle them (VCA Animal Hospitals).
  2. Offer something to lick or a drink of water. Swallowing often stops the spasm.
  3. Briefly cover the nostrils for a second, then lightly massage the throat, or blow gently towards the face. These also encourage your dog to swallow (AKC).
  4. Move your dog somewhere cool with fresh air.

Reducing how often it happens

Walk on a harness. Pressure on the throat from a collar is an easy trigger to remove, and a harness is better for a flat-faced dog’s breathing anyway. Our harness guide covers which type to choose.

Keep the air clean. Avoid smoking around your dog, go easy on air fresheners and sprays, and wash bedding regularly if dust or pollen seem to set episodes off. At night, a cool room and bedding that isn’t piled high help too.

Calm greetings. If excitement is the trigger, keep arrivals and departures low-key and ask visitors to wait until your dog settles before saying hello. If your dog is distressed when left alone, that’s a different problem; our separation anxiety guide covers it.

Investigate allergies properly. If you suspect a food allergy, don’t just swap one protein for another. A food allergy is diagnosed with a strict elimination trial on a novel or limited-ingredient diet for several weeks, and it’s best run with your vet. Our guide to French Bulldog food allergies explains how.

When to see a vet

Take a video of the first episode you see and show it to your vet, so they can confirm it really is reverse sneezing rather than coughing, choking or a breathing problem. After that, see your vet if:

  • Episodes are becoming more frequent or longer.
  • There’s discharge from the nose, especially from one side, or any blood.
  • Your dog paws at their face or seems to have something stuck.
  • Breathing is noisy or labored between episodes.
  • Your dog also has heart disease.

Your vet will rule out other causes of snorting and abnormal breathing, including upper respiratory infection, a collapsing trachea, nasal polyps or tumors, and foreign bodies in the nose or mouth. For some dogs they may prescribe anti-inflammatories, antihistamines or decongestants (VCA Animal Hospitals).

If your dog is struggling to breathe, collapses, or their gums or tongue look blue or grey, it is an emergency. Go to a vet straight away.

Reverse sneezing or collapsing trachea?

The two can sound similar, but they’re different problems. In a collapsing trachea, the cartilage rings that hold the windpipe open weaken and the windpipe flattens. The typical sign is a dry, harsh cough often described as a goose honk, and it is most common in toy breeds such as Yorkshire Terriers and Pomeranians (ACVS).

A reverse sneeze is a burst of snorting inhalations through the nose that stops, after which your dog is normal. A persistent honking cough is not reverse sneezing, and it needs a vet.

The short version

Reverse sneezing looks worse than it is. In a healthy Frenchie it’s usually harmless, it passes within a minute, and a stroke of the neck or a drink of water often ends it sooner. Remove the triggers you can, walk on a harness, and see your vet if episodes change, if there’s discharge or blood, or if your dog struggles to breathe between them. Our health issues guide covers BOAS, the underlying breathing problem many Frenchies have.