Quick answer
A cat sneezing a lot for a day or two, while still eating and acting normally, usually has mild irritation or a viral upper respiratory infection that can be watched at home. Book a vet visit if sneezing lasts more than a week, the nasal discharge turns yellow, green or bloody, or your cat stops eating. Go now if your cat breathes with an open mouth or is a young kitten that seems weak.
A cat sneezing a lot is usually dealing with something in the nose, most often a virus. If you’re not sure how quickly to act, our symptom check will tell you whether to go now, call today or book a visit this week.
Why is my cat sneezing a lot?
Sneezing is how the nose clears irritation. The occasional sneeze after a sniff of dust is normal. Repeated sneezing over hours or days means the lining of the nose is inflamed, and vets call that rhinitis.
The most common cause by far is a viral upper respiratory infection, often called cat flu. Feline herpesvirus and feline calicivirus cause most cases. They spread through close contact, shared bowls and people’s hands, and they’re common after adoption, boarding or a stay in a shelter.
| Cause | Common signs | Urgency |
|---|---|---|
| Irritants (dust, smoke, perfume, scented litter, sprays) | A few sneezes, clear nose, otherwise well | Monitor |
| Viral infection (cat flu) | Sneezing and runny eyes, clear discharge, mild fever, lasts 1–3 weeks | Monitor |
| Secondary bacterial infection | Thick yellow or green discharge, bad smell, poor appetite | See vet soon |
| Allergies | Seasonal or year-round sneezing, clear discharge, sometimes itchy skin | See vet soon |
| Something stuck in the nose (grass blade, seed) | Sudden violent sneezing, pawing at face, one nostril affected | See vet soon |
| Dental disease | Sneezing with bad breath or a tooth root infection near the nose | See vet soon |
| Polyps, fungal infection or a nasal tumor | Long-lasting discharge, noisy breathing, bleeding, facial swelling | See vet soon |
In older cats, sneezing that comes on slowly and only affects one side of the nose is more likely to be a polyp, a fungal infection like Cryptococcus, or a tumor. These need a vet workup, not a wait-and-see approach.
What does sneezing and runny eyes mean in a cat?
Sneezing and runny eyes together point strongly to a viral upper respiratory infection. Herpesvirus tends to cause eye problems, like red, watery or squinting eyes and sometimes corneal ulcers. Calicivirus is more likely to cause mouth ulcers, drooling and sore joints in some cats.
Most healthy adult cats recover in one to three weeks. Kittens, flat-faced breeds, unvaccinated cats and cats with other illnesses can get much sicker. A blocked nose also dulls a cat’s sense of smell, so many sick cats stop eating, and that’s often the bigger danger. For more on these infections, see our guide to cat upper respiratory infection.
Many cats that had herpesvirus as kittens carry it for life. Stress, a move or another illness can bring back flare-ups of sneezing and eye discharge years later.
What does the color of nasal discharge tell you?
Nasal discharge gives your vet useful clues, so note its color and whether it comes from one or both nostrils.
| Discharge | What it often means | Urgency |
|---|---|---|
| Clear and watery, both sides | Early viral infection, irritants or allergies | Monitor |
| Thick yellow or green | Bacteria have moved in on top of a virus or other problem | See vet soon |
| One side only, lasting weeks | Foreign object, polyp, tooth root problem or tumor | See vet soon |
| Bloody or a nosebleed | Foreign object, fungal infection, tumor or a clotting problem | Emergency |
Antibiotics don’t work against the viruses behind most sneezing. Your vet may prescribe them if there are signs of a bacterial infection on top.
Can allergies make a cat sneeze?
Yes, but allergies are a less common cause of sneezing in cats than infections. Allergic rhinitis can be seasonal, from pollen, or year-round, from dust mites, mold or other indoor allergens. The discharge usually stays clear, and the cat keeps eating and acting normally.
Cats with allergies more often show skin signs than nose signs. Itching, over-grooming, bald patches or scabs alongside sneezing make allergies more likely. Coughing or wheezing alongside sneezing can point to asthma, which needs a vet visit.
There’s no simple home test for allergies. Your vet will usually rule out infection and other causes first. Don’t give human antihistamines or decongestants unless your vet tells you to, because some contain ingredients that are dangerous for cats.
When should I take my sneezing cat to the vet?
Book a visit within a few days if:
- Sneezing lasts more than 7 to 10 days, or keeps coming back
- Discharge turns thick, yellow or green, or comes from one side only
- Your cat eats less than usual or seems quiet and tired
- Eyes are red, squinting or have thick discharge
Go the same day, or to an emergency vet, for any of the signs in the red box at the top. Open-mouth breathing or a cat breathing fast at rest is never normal and needs to be seen right away.
For ongoing sneezing, your vet may start with an exam and a look in the mouth. They may then suggest blood tests, a nasal swab or flush, x-rays, or a CT scan and a camera look inside the nose (rhinoscopy) under anesthesia.
| Service | Typical cost |
|---|---|
| Exam | $55 – $110 |
| Upper respiratory PCR panel | $100 – $250 |
| Bloodwork panel | $120 – $260 |
| Skull x-rays | $150 – $350 |
| CT scan with rhinoscopy | $1,500 – $3,500 |
For a full breakdown, see how much a cat vet visit costs.
How can I help a sneezing cat at home?
If your cat has mild sneezing and is still eating, drinking and breathing easily, you can support them at home while you watch for changes.
- Clear the nose and eyes. Gently wipe away discharge with a soft cloth or cotton pad dampened with warm water. Use a fresh one for each eye.
- Add steam. Sit with your cat in a steamy bathroom for 10 to 15 minutes a couple of times a day to help loosen mucus.
- Tempt the appetite. Warm wet food slightly so it smells stronger. Cats that can’t smell their food often won’t eat it. If your cat stops eating, read our guide to a cat not eating and call your vet.
- Cut irritants. Switch to unscented, low-dust litter and avoid smoking, air fresheners and sprays near your cat.
- Separate other cats. Keep a cat with flu signs away from other cats, and wash your hands and their bowls between them.
A stuffy nose is miserable, but the fix is steam and gentle cleaning, not the medicine cabinet. A single dose of a human cold or pain remedy containing acetaminophen (paracetamol) can kill a cat, and many decongestants are toxic too. For other common signs and what they mean, browse our cat symptoms guides.
Frequently asked questions
Should I worry if my cat keeps sneezing but is acting normal?
A few days of sneezing in a cat that's eating, playing and breathing easily is usually mild. Keep an eye on it, and book a vet visit if it lasts more than a week or new signs appear.
Can indoor cats get cat flu?
Yes. Many cats carry feline herpesvirus for life after an early infection, and stress can reactivate it years later. The viruses can also come in on your hands, clothes or a new cat.
Can a cat's cold spread to me or my dog?
The feline herpesvirus and calicivirus that cause most cat colds don't infect people or dogs. They do spread easily between cats, so keep a sneezing cat away from other cats if you can.
Can I give my cat human cold or allergy medicine?
No. Acetaminophen (paracetamol), a common ingredient in cold and flu remedies, can be fatal to cats, and many decongestants and pain relievers are dangerous too. Ask your vet before giving anything.
Sources
Written by the CatsMed Team from the sources above. This guide isn’t reviewed by a veterinarian and isn’t a substitute for one. See how we research.
