# Reverse Sneezing in Cats: Causes and When to Worry Reverse sneezing in cats is a sudden, noisy inward snort that looks alarming but is often harmless. It happens when the soft palate and throat spasm, pulling air in through the nose in short bursts. Most episodes last seconds to a minute or two and stop on their own. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - A short episode of reverse sneezing in an otherwise healthy cat is usually not dangerous and does not need treatment. - The main look-alike to rule out is feline asthma, which causes coughing, wheezing, and open-mouth breathing, not just snorting. - See a vet if episodes happen more than once a week, last longer than a few minutes, or come with discharge, bleeding, or trouble breathing. - Go to an emergency clinic now if your cat's gums look blue, it cannot breathe between episodes, or it collapses. - Never give human cold, allergy, or asthma medicine to a cat. Your veterinarian calculates any dose from your cat's weight and health. ## What Reverse Sneezing Looks Like and What Is Normal A reverse sneeze is a quick, repeated snort. Your cat stands still, stretches its neck forward, and pulls air in through the nose with a raspy sound. The chest may heave. Some cats lick their lips or swallow at the end. Then it stops and the cat acts completely normal. This is different from a regular sneeze, which pushes air out and often sends mucus or droplets flying. Regular sneezing usually points to irritation in the nose. Reverse sneezing points to a spasm in the back of the throat. Normal reverse sneezing is brief, infrequent, and leaves your cat bright and comfortable afterward. Many cats have a few episodes a year, often after drinking, eating fast, pulling on a leash, or breathing in dust or strong smells. If your cat is eating, playing, and sleeping normally between episodes, the pattern is usually benign. If your cat sneezes outward instead, or you are seeing a mix of both, our guide to [cat sneezing causes](/knowledge/veterinary-medicine/online-vet-and-care-costs/cat-sneezing-causes) walks through the common triggers. ## Reverse Sneezing in Cats Causes Several problems can trigger these episodes. Some are harmless. Others need treatment. The table below groups them by what you are likely to see at home. | Cause | Typical clues | How urgent | |---|---|---| | Nasal or throat irritants (dust, smoke, perfume, strong cleaners) | Episodes right after exposure, no other signs, cat fine afterward | Low, remove the trigger | | Inflammatory airway disease | Chronic episodes, more than one a week, often with a cough or wheeze | See your vet soon | | Feline asthma | Coughing, wheezing, fast breathing, open-mouth breathing, exercise intolerance | Urgent, can become an emergency | | Nasal or nasopharyngeal foreign body (grass blade, seed, string) | Sudden onset, one nostril affected, pawing at the face, bloody or foul discharge | Same-day vet visit | | Upper respiratory infection (herpesvirus, calicivirus, Mycoplasma) | Sneezing, runny nose, eye discharge, reduced appetite, fever | See your vet soon | | Anatomical problems (soft palate, nasal polyps, narrowed airway) | Episodes since kittenhood, noisy breathing, snoring | Routine to urgent depending on breathing | | Nasal masses or cancer | Older cat, one-sided blockage, bloody discharge, facial swelling | Urgent | In a study of 30 dogs with reverse sneezing, inflammatory airway disorders were the most common diagnosis at 57 percent, followed by anatomical or functional problems at 27 percent and nasal or nasopharyngeal foreign bodies at 10 percent [1]. Two dogs, or 7 percent, had no final diagnosis [1]. That study looked at dogs, not cats, so treat the numbers as a general guide to how these cases sort out. Cats with rhinitis often have more going on than owners realize. In one study, Mycoplasma species were found in 28.3 percent of cats with rhinitis compared to 5.4 percent of healthy cats, and Mycoplasma felis was found in 21.7 percent of rhinitis cases but none of the healthy controls [2]. Feline herpesvirus was also more common in cats with rhinitis, at 39.1 percent versus 8.1 percent [2]. This matters because a chronic runny nose or repeated snorting may be an infection or virus, not simple reverse sneezing. ### Reverse Sneezing in Cats vs Asthma This is the question owners ask most. Reverse sneezing is an inward snort with a clear start and stop. Asthma is a lower airway disease that causes coughing, wheezing, and labored breathing. A cat with asthma often crouches with its neck extended and may breathe with its mouth open. That is not normal in cats and needs prompt care. If your cat has both snorting and coughing, do not assume it is only reverse sneezing. Ask your vet to evaluate the lower airway too. Our article on [cat sneezing when to worry](/knowledge/veterinary-medicine/online-vet-and-care-costs/cat-sneezing-when-to-worry) covers the breathing signs that separate a mild problem from a serious one. ### Is Reverse Sneezing in Cats Normal? Occasional, brief episodes in a healthy cat are normal. Chronic reverse sneezing in cats is a different story. In the dog cohort, 60 percent of cases had been going on for more than three months and 60 percent had more than one episode a week [1]. Most of those dogs also had another respiratory sign, and 63 percent had a normal physical exam [1]. A normal exam does not rule out a problem, so keep a log of episodes and bring it to your vet. ## Red Flags That Make It an Emergency Some signs mean you should stop reading and call an emergency clinic. - Blue, gray, or white gums or tongue - Open-mouth breathing that does not stop - Breathing that stays fast or labored between episodes - Collapse, weakness, or unresponsiveness - A foreign object you can see in the nose or throat (do not pull it yourself) - Sudden swelling of the face, neck, or throat Swelling in the head and throat can close off the airway fast. In one report, two cats developed severe swelling and oropharyngeal edema after an ear flush procedure, and one cat could not be extubated until the swelling resolved the next day [3]. That was a procedure-related event, not reverse sneezing, but it shows how quickly upper airway swelling becomes dangerous in cats. ## Safe Things You Can Do at Home While You Wait Stay calm. Your cat picks up on your stress, and a calm room helps the episode end faster. - Let the episode finish. Do not stick your fingers or cotton swabs into the nose or throat. - Gently stroke your cat's throat or cover the nostrils for a second or two to encourage swallowing. This often breaks the spasm. - Move your cat away from dust, smoke, perfume, scented litter, and strong cleaners. - Note the time, how long it lasted, and what happened right before. This log helps your vet. - Keep the air clean with a HEPA filter and avoid aerosol sprays near the cat. - Do not give any human medication. Never give a cat acetaminophen, ibuprofen, or human antihistamines without veterinary direction. If your cat has a long-standing nasal problem, ask your vet about safe saline nose drops. Your veterinarian calculates any dose or product choice from your cat's weight and health. ## What Your Veterinarian Will Check and Test Your vet starts with the history and a full physical exam, including listening to the heart and lungs and looking at the nose, mouth, and throat. They will ask about episode frequency, duration, and triggers. Depending on what they find, they may recommend: - A nasal swab for PCR testing for Mycoplasma, feline herpesvirus, feline calicivirus, Bordetella, and Chlamydia [2] - Blood work to check for infection, inflammation, and organ function - Chest X-rays to look for asthma or other lung disease - A sedated oral exam to look for foreign bodies, polyps, or masses - Advanced imaging such as CT or rhinoscopy if the problem is one-sided or chronic Allergy testing may come up if your cat has year-round sneezing and itchy skin. Cat allergen immunotherapy is used in people with cat-induced allergic rhinitis and asthma, and it is given for at least six months in reported cases [4]. That research is about humans, not cats, so ask your vet what is appropriate for your cat. If your cat has been sneezing a lot with no clear trigger, our article on [cat sneezing a lot](/knowledge/veterinary-medicine/vet-visit-decisions/cat-sneezing-a-lot) covers allergies, infection, and other possibilities. ## Prevention and Monitoring You cannot prevent every episode, but you can lower the triggers and catch problems early. - Keep a simple log with dates, times, and what your cat was doing. - Use dust-free, unscented litter and avoid scented candles, plug-ins, and sprays. - Vacuum and change furnace filters regularly. - Keep your cat indoors to reduce exposure to pollen, seeds, and grass awns. - Stay current on vaccines and flea control as your vet advises. - Watch for weight loss, appetite changes, and one-sided nasal discharge, which point to something more than simple reverse sneezing. If your cat has asthma, follow the treatment plan exactly. Uncontrolled asthma can turn a mild cough into a crisis. ## Limitations and When to Contact a Veterinarian This article gives general guidance, but every cat is different. Individual cases need a veterinarian who can examine your cat and run the right tests. Call your vet the same day if you see: - Episodes more than once a week - Episodes lasting longer than a few minutes - Nasal discharge that is thick, yellow, green, or bloody - One-sided nasal blockage or facial swelling - Coughing, wheezing, or reduced appetite - A sudden change in episode pattern Go to an emergency clinic now if you see: - Blue or pale gums - Open-mouth breathing or severe effort to breathe - Collapse or unresponsiveness - A visible foreign object in the nose or throat - Rapid swelling of the face or neck Schedule a routine visit if episodes are occasional and your cat is otherwise normal, but you want peace of mind. Bring your log. It speeds up the visit and helps your vet decide what to test. ## Frequently Asked Questions ### Is reverse sneezing in cats dangerous? Usually no. A short episode in a healthy cat is harmless. It becomes a concern when episodes are frequent, last a long time, or come with breathing trouble, discharge, or bleeding. Those signs need a vet visit. ### How can I tell reverse sneezing from asthma in my cat? Reverse sneezing is an inward snort that stops quickly and leaves your cat normal. Asthma causes coughing, wheezing, and labored breathing, sometimes with open-mouth breathing. If you see coughing or heavy breathing, treat it as urgent. ### Should I stop my cat from reverse sneezing? You cannot stop the spasm directly, and you should not put anything in your cat's nose or throat. Stay calm, let the episode pass, and gently stroke the throat. If episodes keep coming back, see your vet. ### Can allergies cause reverse sneezing in cats? Yes. Dust, smoke, pollen, and strong scents can irritate the nose and throat and trigger episodes. Removing the trigger often helps. Year-round signs may need allergy testing and a treatment plan from your vet. ### When should I take my cat to the vet for reverse sneezing? Book a visit if episodes happen more than once a week, last longer than a few minutes, or come with discharge, bleeding, appetite loss, or breathing changes. Go to an emergency clinic for blue gums, collapse, or severe breathing effort. ## Related Articles - [Cat Sneezing: Common Causes and When to Worry](/knowledge/veterinary-medicine/online-vet-and-care-costs/cat-sneezing-causes) - [Cat Sneezing: When to Worry and How to Help](/knowledge/veterinary-medicine/online-vet-and-care-costs/cat-sneezing-when-to-worry) - [Why Is My Cat Sneezing?](/knowledge/veterinary-medicine/symptom-guides/why-is-my-cat-sneezing) - [Cat Sneezing a Lot: Allergies, Infection, or Something Else?](/knowledge/veterinary-medicine/vet-visit-decisions/cat-sneezing-a-lot) - [Dog Reverse Sneezing](/knowledge/veterinary-medicine/clinical-methods/dog-reverse-sneezing) - [Dog Is Reverse Sneezing More Than Usual](/knowledge/veterinary-medicine/clinical-methods/dog-is-reverse-sneezing-more-than-usual) - [Why Is My Kitten Wheezing? Causes and When to Worry](/knowledge/veterinary-medicine/symptom-guides/kitten-wheezing-causes) - [Why Is My Cat Panting? Causes and When to Worry](/knowledge/veterinary-medicine/symptom-guides/cat-panting-causes-when-to-worry) - [Do Cats Get Colds? Symptoms, Causes, and When to Worry](/knowledge/veterinary-medicine/symptom-guides/do-cats-get-colds) - [Cat Respiratory Infections: Etiology, Clinical Signs, Zoonotic Potential, and Management](/knowledge/bacteria/pet-bacteria/cat-respiratory-infections-etiology-clinical-signs-zoonotic-potential-management) ## References 1. [Reverse Sneezing in Dogs: Observational Study in 30 Cases](https://pubmed.ncbi.nlm.nih.gov/36548826/). Veterinary sciences, 2022. 2. [EXPRESS: Detection of Mycoplasma species and respiratory pathogens in cats with rhinitis and healthy cats](https://pubmed.ncbi.nlm.nih.gov/42751890/). Journal of feline medicine and surgery, 2026. 3. [Unexpected upper airway obstruction after ear flushing in two cats](https://pubmed.ncbi.nlm.nih.gov/39986925/). Veterinary anaesthesia and analgesia, 2025. 4. [Clinical Outcomes of Cat Allergen Immunotherapy in Patients With Allergic Rhinitis: A Real-World Study](https://pubmed.ncbi.nlm.nih.gov/41911585/). The Journal of craniofacial surgery, 2026. ## Further Reading - [Merck Veterinary Manual: Cat Owners](https://www.merckvetmanual.com/cat-owners) - [Cornell Feline Health Center: Health Information](https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information) - [American Veterinary Medical Association: Pet Care](https://www.avma.org/resources-tools/pet-owners/petcare)