Is reverse sneezing dangerous?

Usually not — episodes last seconds to a minute and resolve on their own. Persistent breathing difficulty, nasal discharge, or collapse after episodes needs veterinary investigation.

Which breeds reverse sneeze most?

Small breeds and brachycephalic dogs are commonly affected. Excitement, pulling on the lead, and irritants in the nose often trigger episodes.

Can allergies cause reverse sneezing?

Yes — dust, pollen, perfumes, and strong cleaning products can irritate the nasal passages. Seasonal patterns may overlap with other allergy signs.

Should I record an episode for my vet?

Yes — a short video helps your vet distinguish reverse sneezing from choking, collapse, or kennel cough. Note what happened just before the episode.

Dog Health

Reverse Sneezing in Dogs: UK Guide — What It Is & When to Worry

Published 25 June 2026Last updated 25 June 20264 min read

Quick answer

Reverse sneezing is usually harmless — your dog pulls air rapidly inward through the nose with a snorting or honking sound, neck extended. Episodes last seconds to a minute. Calm your dog and note triggers. See a vet if episodes are frequent, paired with discharge, or breathing stays laboured afterward.

Reverse sneezing vs normal sneezing

Normal sneezing expels air outward to clear the nose. Reverse sneezing — also called inspiratory paroxysmal respiration — pulls air inward rapidly through the nose. It sounds alarming but is usually a benign reflex.

Usually harmless:

Short episodes lasting seconds to one minute
Dog returns to normal immediately afterward
Triggered by excitement, pulling on the lead, or dust
Occasional episodes in small or flat-faced breeds

Needs investigation:

Episodes becoming much more frequent
Nasal discharge — yellow, green, or bloody
Difficulty breathing between episodes
Collapse or extreme distress after an episode
Episodes paired with coughing or sneezing with discharge

Common triggers in UK dogs

Trigger	Typical signs	Notes
Excitement or play	Brief honking after greeting or play	Resolves quickly
Lead pressure	Episode when pulling on collar	Harness may reduce triggers
Allergens and irritants	Seasonal or after hoovering	See Dog allergies
Post-nasal drip	After upper respiratory infection	May follow Kennel cough
Foreign body	Sudden violent episodes, one nostril	Grass seeds — vet removal needed
Nasal mites or infection	Frequent episodes with discharge	Needs examination
Anatomical factors	Common in brachycephalic breeds	May overlap with breathing issues

What it looks like

Your dog suddenly stands still with neck extended, elbows spread, and makes rapid snorting or honking sounds while pulling air through the nose. Eyes may bulge slightly. Then it stops — often as abruptly as it started.

When to see a vet urgently

Phone your vet the same day or use emergency out-of-hours care if:

Difficulty breathing that does not resolve after the episode
Pale or blue gums or open-mouth breathing at rest
Bloody nasal discharge or violent sneezing that will not stop
Collapse or extreme distress after an episode
Choking suspected — gagging without the typical reverse sneeze pattern

Book a routine appointment within a few days for episodes that are increasing in frequency or paired with nasal discharge.

Home care during an episode

While an episode is happening:

Stay calm — your dog picks up on anxiety
Gently massage the throat or briefly cover the nostrils to encourage swallowing — some dogs stop sooner
Speak softly and reduce stimulation
Video the episode if safe — helps your vet

Between episodes, note:

Triggers — walks, excitement, perfumes, cleaning products
Frequency — daily, weekly, or occasional
Other symptoms — eye discharge, coughing, or bad breath

What you can do at home:

Use a harness instead of a collar if lead pulling triggers episodes
Reduce strong scents — air fresheners, smoke, dusty bedding
Keep vaccinations and kennel cough protection up to date for social dogs
Wipe clear nasal discharge gently with a damp cloth

What not to do:

Do not assume every snorting sound is reverse sneezing — choking is different
Do not poke objects into the nostril
Do not ignore frequent episodes with discharge

What your vet may do

If episodes are frequent or atypical, examination may include checking the nostrils, throat, and teeth. Your vet might recommend:

Sedated nasal exam if a foreign body is suspected
Treatment for underlying infection or allergies
Allergy management if irritants are the main trigger
Referral if anatomical breathing problems are suspected in flat-faced breeds

Most dogs need no treatment — understanding the reflex and reducing triggers is enough.

Sources & further reading

Facts in this guide are rewritten in plain English from publicly available UK advice. We name the organisation where a specific point comes from their guidance. Links below go to the original pages — use them to read the source material directly.

PETHEALTH+ is independent. These organisations do not sponsor, approve, or partner with this website. Guidance checked against sources listed below (last updated 2026-06-25).

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Frequently Asked Questions

Is reverse sneezing dangerous?: Usually not — episodes last seconds to a minute and resolve on their own. Persistent breathing difficulty, nasal discharge, or collapse after episodes needs veterinary investigation.
Which breeds reverse sneeze most?: Small breeds and brachycephalic dogs are commonly affected. Excitement, pulling on the lead, and irritants in the nose often trigger episodes.
Can allergies cause reverse sneezing?: Yes — dust, pollen, perfumes, and strong cleaning products can irritate the nasal passages. Seasonal patterns may overlap with other allergy signs.
Should I record an episode for my vet?: Yes — a short video helps your vet distinguish reverse sneezing from choking, collapse, or kennel cough. Note what happened just before the episode.