Dog & cat health · Vet-reviewed guide

Why Is My Cat Sneezing? Causes and When to Worry

An occasional sneeze from a bright, happy cat is usually nothing. It's the persistent sneezing, with runny eyes or a poor appetite, that's worth a closer look.

Quick answer: Why is my cat sneezing? Most of the time an occasional sneeze is completely normal, just a response to a tickle from dust, litter, or a stray bit of fur. If your cat sneezes once in a while and is otherwise bright, eating, and playful, there is usually nothing to worry about.

The picture changes when sneezing becomes frequent or persistent, or comes with other signs like a runny nose, watery eyes, or a drop in appetite. Then it more often points to an underlying cause, most commonly an upper respiratory infection, but also allergies, an irritant, dental disease, or, less often, a foreign body or nasal growth. One sign to take seriously right away is sneezing with blood, which needs prompt veterinary attention. This guide walks through the common and serious causes, what is normal, and when to see a vet.

When sneezing is normal

Cats sneeze for the same simple reason people do: something irritates the nose. Dust, litter, cleaning sprays, perfume, or a bit of fur can trigger a sneeze or two, and if your cat is immediately back to normal afterward, that is not a concern.¹ Occasional, isolated sneezes in an otherwise healthy cat rarely need a vet.

Common causes of persistent sneezing

• Upper respiratory infection (a "cat cold"). The most common cause of frequent sneezing, usually viral, often with a runny nose and watery eyes. See our guides on cat URI treatment and cat cold treatment.²
• Irritants and allergies. Smoke, dust, aerosols, and scented products can cause ongoing sneezing; removing the trigger often helps.
• Dental disease. Infection in an upper tooth root sits close to the nasal passages and can cause sneezing.
• A foreign body. A blade of grass or seed lodged in the nose causes sudden, intense, often one-sided sneezing.

The red flag: sneezing with blood

Sneezing that produces blood, or a persistent one-sided nasal discharge, is not something to watch and wait on. It can point to a foreign body, a serious infection, or a nasal growth, and it needs prompt veterinary attention.² Treat bloody sneezing as a reason to call the vet the same day.

What to do at home

For mild, occasional sneezing, reduce irritants: use low-dust litter, avoid spraying aerosols near your cat, and keep the air clean. If a cold seems to be starting, gentle supportive care such as humidity and keeping the face clean can help, but never use essential oils, which are toxic to cats.¹ Do not give human cold or allergy medicines, many of which are dangerous for cats.

When to see a vet

Book a visit if the sneezing is frequent or lasts more than a few days, or if it comes with nasal or eye discharge, reduced appetite, lethargy, or difficulty breathing, and seek care promptly for any blood or for a young kitten or senior cat.² A vet can find the cause and, if an infection needs treatment, prescribe the right medicine. If your cat needs a prescription, our licensed veterinarians can review your cat and issue one when appropriate. See how our vet prescription service works.