Most repeated sneezing in cats comes from irritation or illness in the nose and upper airways, and it ranges from harmless “dust up the nose” to infections that need a vet visit.

Common reasons your cat keeps sneezing

  • Simple irritants: Dust, litter dust, perfume, smoke, cleaning sprays, or strong kitchen smells can mechanically tickle the nasal passages and cause occasional sneezes.
  • Allergies: Some cats are sensitive to pollen, dust mites, mold, or certain chemicals and may sneeze along with itchy eyes, runny nose, or skin issues.
  • Upper respiratory infection (like a cat “cold”): Very common in cats; viruses such as feline herpesvirus or calicivirus, and sometimes bacteria, can cause sneezing, nasal discharge, eye discharge, fever, and reduced appetite.
  • Chronic respiratory disease: Cats can develop long‑term problems such as chronic rhinitis, bronchitis, or asthma, leading to frequent sneezing and congestion over weeks or months.
  • Foreign body in the nose: A blade of grass, fluff, or a bit of food trapped in the nasal passage can cause repeated sneezes, sometimes with one‑sided discharge or pawing at the face.
  • Dental problems: Infection or tooth root disease in the upper jaw can extend into the nasal cavity and trigger sneezing and nasal discharge, often on one side.
  • Nasal polyps or tumors (less common): Abnormal growths inside the nose can cause persistent sneezing, noisy breathing, or bloody discharge, especially in older cats.
  • Stress reactivating herpesvirus: Many cats carry feline herpesvirus for life; stress can “wake it up,” leading to bouts of sneezing and eye/nose discharge during flare‑ups.

When you should call the vet

Contact a vet promptly if you notice any of these along with sneezing:

  1. Sneezing many times a day for more than a few days.
  2. Thick, yellow, green, or bloody nasal discharge.
  3. Red, swollen, or goopy eyes.
  4. Breathing with mouth open, noisy/wheezy breathing, or effort to breathe.
  5. Not eating, hiding, lethargy, or feverish behavior (very warm ears and paws).
  6. Facial swelling, bad mouth odour, or drooling.

These signs often mean an infection, dental disease, or another problem that needs examination and sometimes medication or imaging.

Simple things you can check or do at home

While you’re arranging vet care (or if the sneezing is mild and your cat otherwise seems well), you can:

  • Reduce irritants: Avoid smoking, spray cleaners, air fresheners, or scented candles around your cat; switch to a low‑dust litter if the sneezing is worse after using the box.
  • Humidify the air: A humidifier in the room can make breathing more comfortable for congested cats, similar to humans with a cold.
  • Gently clean the nose/eyes: Use a warm, damp cloth to wipe away discharge; always use a fresh part of the cloth for each eye/nasal side to avoid spreading infection.
  • Monitor patterns: Note when the sneezing happens (after using litter, when windows are open, after cleaning) and any new products in the home; this helps your vet pinpoint triggers.

One quick example

If your cat only sneezes a couple of times right after jumping out of the litter box, has clear eyes, normal energy, and eats well, dusty litter or minor irritation is likely and not an emergency, though a litter change can help. If the same cat starts having thick nasal discharge and stops finishing meals, that pattern points much more toward an upper respiratory infection that should be checked by a vet soon.

Bottom note: Information gathered from public forums or data available on the internet and portrayed here.