A cat that’s sneezing and coughing is most likely dealing with an upper respiratory infection, which is essentially the feline version of a cold. Less commonly, the symptoms point to asthma, environmental irritants, dental disease, or other conditions that affect the airways. The combination of both sneezing and coughing can sometimes mean two separate things are happening at once, since sneezing originates in the nose and sinuses while coughing comes from the lower airways or lungs.
Upper Respiratory Infections: The Most Common Cause
The vast majority of sneezing and coughing episodes in cats trace back to a handful of well-known pathogens. Feline herpesvirus-1 and feline calicivirus are the two primary viral culprits, while bacteria like Bordetella bronchiseptica, Chlamydia felis, and Mycoplasma felis often play a role either on their own or alongside a virus. Co-infections are common, meaning your cat may be fighting off more than one pathogen at the same time.
A typical upper respiratory infection looks a lot like a human cold: sneezing, runny nose, watery or goopy eyes, mild lethargy, and reduced appetite. Symptoms usually appear within two to six days of exposure and last one to three weeks in otherwise healthy cats. Kittens, elderly cats, and cats with weakened immune systems tend to get hit harder and take longer to recover.
One important quirk of these infections: the bacteria involved are sometimes found in perfectly healthy cats, too. That means a positive test doesn’t always tell the full story, and your vet will consider the overall clinical picture rather than relying on a single swab result.
Coughing vs. Sneezing vs. Hairballs
Telling these apart in cats is genuinely tricky. A coughing cat often looks like it’s gagging or about to vomit, which leads many owners to assume their cat is just working on a hairball. The key difference is that a cough produces little or nothing, while a hairball attempt eventually brings something up. Cats with asthma or bronchial irritation will cough and look exactly like they’re trying to produce a hairball, sometimes for days, without ever expelling one.
Sneezing is easier to identify. It looks and sounds similar to a human sneeze, with the head jerking forward and discharge sometimes spraying from the nose. If your cat is doing both, sneezing and coughing, that suggests irritation or infection in both the upper airways (nasal passages, sinuses) and lower airways (bronchial tubes, lungs).
Feline Asthma
Asthma affects a significant number of cats and is one of the most common reasons for chronic coughing. It’s caused by an allergic reaction to inhaled particles that triggers inflammation and narrowing of the airways. During an asthma attack, cats typically hunch their body close to the ground and stretch their neck forward in a distinctive posture while coughing or wheezing. Between attacks, they may seem completely normal.
The symptoms range widely. Some cats have occasional mild coughing episodes that are easy to overlook. Others experience acute respiratory crises with rapid breathing, open-mouth panting, and visible distress. Common triggers include dust, pollen, mold, cigarette smoke, scented litter, aerosol sprays, and household cleaning products.
Diagnosing asthma requires ruling out conditions that look very similar, including chronic bronchitis, lungworm infection, parasites that migrate into the lungs, and various forms of pneumonia. Your vet will typically start with chest X-rays and may recommend additional testing depending on what they find.
Environmental Irritants and Allergies
Sometimes the cause is simpler than an infection. Smoke, strong perfumes, cleaning products, scented candles, and dusty cat litter can all irritate a cat’s sensitive nasal passages and trigger sneezing. Small particles like dust or bits of grass can also get lodged in the nasal passages, causing persistent sneezing until the debris works its way out or is removed.
Cats can develop allergies to pollen, mold, dust mites, and even certain foods. Allergic sneezing tends to follow a pattern: it’s seasonal if pollen is the trigger, or it flares up after exposure to a specific product. If you recently switched litter brands, started using a new air freshener, or notice the sneezing worsens during certain times of year, an environmental irritant is worth considering.
Dental Disease
This one surprises most cat owners. The roots of a cat’s upper teeth sit very close to the nasal passages, and severe periodontal disease, tooth root abscesses, or inflammation of the gums can cause chronic nasal irritation and sneezing. If your cat has bad breath, difficulty eating, drooling, or visible tartar buildup alongside the sneezing, dental problems could be a contributing factor. Vets evaluating chronic sneezing will often examine the teeth and jawbone for signs of abscess or inflammation.
Heartworm Associated Respiratory Disease
A less common but serious cause of coughing in cats is heartworm infection. When immature heartworms arrive in the small arteries of the lungs, they trigger severe inflammation that damages the airways and the tiny air sacs where oxygen exchange happens. Veterinary researchers call this heartworm associated respiratory disease, or HARD.
The symptoms, including coughing, gagging, rapid breathing, and difficulty breathing, overlap heavily with feline asthma, making it easy to misdiagnose. Other signs include intermittent vomiting, loss of appetite, lethargy, and weight loss. HARD is worth considering especially if your cat isn’t on a heartworm preventive, since even indoor cats can be bitten by mosquitoes.
Helping a Congested Cat at Home
If your cat has a mild upper respiratory infection and is still eating, drinking, and breathing comfortably, steam therapy can help loosen congestion. Bring your cat into the bathroom, close the door and any windows, turn off vent fans, and run a hot shower until the room fills with steam. Keep your cat in the steamy room for 10 to 15 minutes, letting them breathe the moist air. You can do this once a day or more, depending on how congested they are.
Beyond steam sessions, make sure your cat stays hydrated. Offering wet food instead of dry can help, since cats with stuffy noses often lose interest in food they can’t smell. Gently wiping discharge from their nose and eyes with a warm, damp cloth keeps them comfortable and helps them breathe more easily. Keep their environment free of strong scents, aerosol sprays, and dusty litter during recovery.
Vaccination and Prevention
The FVRCP vaccine, which is considered a core vaccine for all cats, protects against feline herpesvirus, calicivirus, and panleukopenia. It won’t completely prevent upper respiratory infections, but it significantly reduces the severity of symptoms if your cat is exposed. Kittens need a series of shots starting as early as six weeks, with boosters every three to four weeks until they’re at least 12 weeks old. Adult cats get a booster at one year, then every three years after that.
It’s worth understanding that these vaccines limit illness rather than block infection entirely. A vaccinated cat can still catch a respiratory virus, but they’ll typically recover faster and feel less miserable than an unvaccinated cat would.
Signs That Need Urgent Attention
Most sneezing and coughing resolves on its own or with basic veterinary care, but certain signs indicate a serious problem. Open-mouth breathing in a cat is always an emergency. Cats are obligate nose breathers, so if your cat is panting or breathing through their mouth, something is significantly wrong. Other red flags include blue or pale gums, rapid continuous breathing, standing with elbows pointed outward and neck extended, exaggerated chest or belly movements while breathing, collapse, or obvious distress and inability to settle. Any of these warrant an immediate trip to an emergency vet, as respiratory distress in cats can worsen rapidly and become life-threatening.
Outside of emergencies, plan a regular vet visit if the sneezing or coughing lasts more than a few days, if there’s thick or colored nasal discharge, if your cat stops eating, or if the symptoms keep coming back. Chronic or recurring respiratory symptoms often point to something beyond a simple cold, whether that’s asthma, dental disease, nasal polyps, or a persistent infection that needs targeted treatment.