Cat Health
Cat Sneezing: Common Causes, Home Care & When to Worry
Published Last updated 3 min read
Quick answer
Occasional sneezing in cats is usually harmless — dust, litter particles, or strong scents can trigger a sneeze. Persistent sneezing with nasal discharge, eye watering, fever, or appetite loss may indicate upper respiratory infection, allergies, or a nasal foreign body. Contact your vet if symptoms last more than a few days or your cat seems unwell.
Normal vs concerning sneezing
A single sneeze clears the nasal passages — the same reflex as in people. Cats may sneeze after sniffing litter dust, pollen, or strong cleaning products.
Concerning patterns include:
- Sneezing multiple times daily for more than three to five days
- Nasal discharge — clear, yellow, green, or bloody
- Eye discharge or squinting
- Noisy breathing, snoring, or open-mouth breathing
- Reduced appetite — cats won't eat what they can't smell
- Lethargy and fever
Upper respiratory infections (URIs)
The most common cause of persistent sneezing in cats is feline upper respiratory infection — often called a "cat cold." Pathogens include:
- Feline herpesvirus (FHV-1) — the most common cause; may recur during stress
- Feline calicivirus
- Chlamydia and Bordetella — bacterial components
URIs spread between cats through sneezing, shared bowls, and grooming. Shelter cats, kittens, and unvaccinated cats are most vulnerable.
Symptoms include sneezing, nasal and eye discharge, conjunctivitis, fever, and mouth ulcers (calicivirus). Most cats recover in one to three weeks, but herpesvirus carriers may have lifelong intermittent flare-ups.
Allergies and irritants
Environmental allergens — pollen, mould, dust mites — cause sneezing with less systemic illness than infection. Irritants include:
- Dusty litter — switch to low-dust formulas
- Smoke, candles, and aerosol sprays
- Essential oil diffusers — many oils are toxic to cats
- New cleaning products
Removing the trigger often resolves irritant-related sneezing within days.
Other causes of feline sneezing
Foreign bodies
Grass blades or seeds lodged in the nasal cavity cause sudden, intense sneezing — often one-sided discharge. Sedated nasal examination may be needed for removal.
Dental disease
Infections of upper teeth roots can erode into the nasal passage, causing chronic sneezing and nasal discharge on one side.
Nasal tumours
Older cats with progressive one-sided nasal discharge, facial deformity, or bloody sneezing may have nasal cancer. Imaging and biopsy confirm diagnosis.
Fungal infections
Less common but serious — nasal aspergillosis causes chronic discharge and facial pain.
Home care for mild sneezing
If your cat is bright, eating, and sneezing only occasionally:
- Reduce dust — low-dust litter, regular vacuuming
- Avoid scented products near the cat
- Use a humidifier to ease irritated nasal passages
- Warm, strong-smelling food if appetite dips slightly
Do not give human cold medications — many are toxic to cats.
When to see your vet
Schedule an appointment for:
- Sneezing lasting more than five days
- Green, yellow, or bloody nasal discharge
- Eye discharge, squinting, or third eyelid showing
- Kittens or senior cats with any URI signs
- Open-mouth breathing or significant lethargy
Treatment may include antibiotics for bacterial components, antiviral support for herpesvirus flare-ups, lysine supplementation (controversial but sometimes used), nebulisation, and appetite support.
Core vaccinations (FVRCP) reduce severity of calicivirus and herpesvirus but do not prevent all URIs.
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 2026-06-24).
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Frequently Asked Questions
- Why is my cat sneezing a lot?
- Upper respiratory infections, allergies, irritants like dust or perfume, dental disease, and foreign bodies in the nose are common causes. Persistent sneezing beyond a few days needs a veterinary exam.
- Can cats catch colds from humans?
- Most human cold viruses do not infect cats. Feline upper respiratory infections are caused by species-specific viruses and bacteria spread between cats.
- When should I worry about my cat sneezing?
- See your vet if sneezing lasts more than a few days, includes coloured nasal discharge, blood, eye discharge, fever, reduced appetite, or open-mouth breathing.
- Do kittens sneeze more than adult cats?
- Kittens are more susceptible to upper respiratory infections, especially from shelters or multi-cat environments. Sneezing with eye discharge in kittens needs prompt veterinary care.