--- title: "Why Is My Dog Sneezing?" description: "Occasional dog sneezing is usually harmless — dust, pollen, or play. Persistent sneezing with discharge, blood, or pawing at the face may mean infection." url: "https://pethealth.org.uk/health/why-is-my-dog-sneezing" canonical: "https://pethealth.org.uk/health/why-is-my-dog-sneezing" date_published: "2026-06-25" date_modified: "2026-06-25" source: "PETHEALTH+" --- # Why Is My Dog Sneezing? **Occasional sneezing is normal** — dogs clear dust, pollen, and strong scents from their nose. **Frequent sneezing with green or bloody discharge, one-sided symptoms, pawing at the face, or loss of appetite** needs a vet — often infection, a grass seed in the nostril, or dental disease. Reverse sneezing sounds alarming but is usually harmless. ## Normal sneezing vs illness A few sneezes after sniffing grass, rolling in dust, or entering a warm house is a **normal reflex**. According to Blue Cross, dogs explore the world nose-first, so irritants are common. **Usually harmless:** - Single or occasional sneezes outdoors - Sneezing after dust from hoovering or dry weather - **Play sneezing** during rough-and-tumble — short bursts with a relaxed body - Brief reverse sneezing episodes — see [Reverse sneezing in dogs](/health/dog-reverse-sneezing) **Needs investigation:** - Sneezing **many times daily** for more than a few days - **Yellow, green, or bloody** nasal discharge - **One nostril** affected more than the other - **Pawing at the face**, rubbing nose on carpet - **Foul smell** from the nose or mouth - **Lethargy, fever, or reduced appetite** ## Common causes in UK dogs | Cause | Typical signs | Notes | |-------|---------------|-------| | **Dust, pollen, scents** | Clear discharge, seasonal pattern | May overlap with [dog allergies](/health/dog-allergies-and-itching) | | **Kennel cough** | Honking cough, sneezing, runny nose | Spread at parks, kennels, day care — see [Kennel cough](/health/kennel-cough-in-dogs) | | **Foreign body** | Sudden violent sneezing, one nostril | Grass seeds common in summer — vet removal needed | | **Dental abscess** | One-sided discharge, bad breath | Upper back teeth — see [Dog dental care UK](/health/dog-dental-care-uk) | | **Nasal infection** | Chronic discharge, facial pain | Fungal and bacterial — diagnosis needs vet swabs | | **Nasal tumours** | Progressive one-sided bleeding | More common in **senior dogs** — early vet check matters | ### Reverse sneezing — not the same as sneezing Many owners confuse **reverse sneezing** with normal sneezing. During a reverse sneeze, your dog pulls air in rapidly through the nose with a **snorting or honking** sound, neck extended. Episodes usually last seconds to a minute and resolve on their own. If episodes are frequent or paired with discharge, book a vet check. ### Play sneezing Dogs sometimes sneeze deliberately during play to signal **friendly intent**. If your dog is otherwise well and sneezes only during excitement, this is behavioural — not a medical problem. ## When to see a vet urgently Phone your vet **the same day** or use **emergency out-of-hours care** if: - **Blood** from the nose — fresh or clotted - **Sudden violent sneezing** that will not stop, especially after walking in long grass - **Difficulty breathing**, open-mouth breathing, or **blue or pale gums** — see [Pale gums in dogs](/health/dog-pale-gums) - **Head trauma** or suspected poisoning - **Puppy or unvaccinated dog** with discharge and lethargy - Sneezing with **collapse or extreme distress** Book a **routine appointment within a few days** for persistent sneezing without emergency signs — chronic discharge rarely resolves without treatment. ## Home monitoring before your appointment While waiting for a vet visit, note: - **When** sneezing started and whether it is worsening - **One or both nostrils** — photograph any discharge colour if safe - **Recent walks** — long grass, foxholes, or dusty areas - **Other symptoms** — [coughing](/health/why-is-my-dog-coughing), [eye discharge](/health/dog-eye-discharge), [bad breath](/health/dog-bad-breath-causes) - **Vaccination and kennel cough** history **What you can do at home:** - Avoid **strong air fresheners, smoke, and dusty bedding** - Use a **damp cloth** to gently wipe clear discharge from the nostrils - Keep your dog **calm and hydrated** — offer fresh water - Do **not** give human cold medicines — many are toxic to dogs **What not to do:** - Do not poke cotton buds into the nostril - Do not delay if **blood or breathing difficulty** is present - Do not assume grass seeds will work their way out — they often migrate deeper ## What your vet may do Examination may include checking teeth, nostrils, lymph nodes, and temperature. Your vet might recommend: - **Sedated nasal exam** or rhinoscopy for foreign bodies - **Dental X-rays** if tooth root disease is suspected - **Swabs or imaging** for chronic or one-sided disease - **Antibiotics or anti-inflammatories** for infection — vet prescribed only Treatment depends on cause — grass seeds are removed under sedation; dental abscesses need extraction or root treatment; kennel cough is usually managed with rest and vet-directed care. ## Related guides - [Reverse sneezing in dogs](/health/dog-reverse-sneezing) - [Kennel cough in dogs](/health/kennel-cough-in-dogs) - [Dog allergies and itching](/health/dog-allergies-and-itching) - [Why is my dog coughing?](/health/why-is-my-dog-coughing) - [Dog dental care UK](/health/dog-dental-care-uk) - [Dog bad breath causes](/health/dog-bad-breath-causes) ## FAQs ### Can dogs get colds? Dogs do not catch human colds, but they get respiratory infections — kennel cough, canine influenza, and bacterial rhinitis all cause sneezing, coughing, and nasal discharge. Multi-dog households and kennels are higher risk. ### Why does my dog sneeze on the grass? Sniffing stirs dust, pollen, and grass particles into the nostrils. Some dogs also 'play sneeze' during excitement — a short burst of sneezes while bowing or playing is normal social behaviour, not illness. ### Is bloody sneeze an emergency? Yes — blood from one or both nostrils needs urgent vet assessment. Causes include foreign bodies, fungal infection, dental abscess, trauma, or tumours. Do not wait to see if it stops on its own. ### Do dental problems cause sneezing in dogs? Yes — infected upper premolars and molars sit close to the nasal cavity. An abscess can drain into the nose, causing one-sided sneezing, foul breath, and sometimes bloody or pus-like discharge. ## Sources - [PDSA — Kennel cough in dogs](https://www.pdsa.org.uk/pet-help-and-advice/pet-health-hub) - [Blue Cross — Dog health and injuries](https://www.bluecross.org.uk/pet-advice) - [RSPCA — Dogs](https://www.rspca.org.uk/adviceandwelfare/pets/dogs) Canonical HTML: https://pethealth.org.uk/health/why-is-my-dog-sneezing Last modified: 2026-06-25