A cat that’s drooling and sneezing at the same time almost always has something irritating or inflaming its mouth, nose, or throat. The most common cause is an upper respiratory infection, essentially the cat version of a cold, but dental disease, toxic plant exposure, and physical obstructions can also produce this combination. The two symptoms together narrow the possibilities considerably, because they point to a problem affecting the oral and nasal passages simultaneously.
Upper Respiratory Infections
The most likely explanation, especially if the symptoms appeared within the last few days, is a feline upper respiratory infection. Two viruses cause the vast majority of these: feline herpesvirus and feline calicivirus. Both spread easily between cats and are especially common in shelters, multi-cat households, and recently adopted kittens.
Feline calicivirus is particularly known for producing both symptoms at once. It destroys cells lining the mouth, creating painful ulcers on the tongue and gums. These ulcers make swallowing uncomfortable, so saliva pools and drips from the mouth. At the same time, the virus triggers sneezing and a watery nasal discharge. Cats with calicivirus often stop eating, and the drooling and loss of appetite can actually be more noticeable than the sneezing itself.
Feline herpesvirus tends to hit the eyes and nose harder, causing colored discharge from the eyes or nose, swelling around the eyes, coughing, sneezing, lethargy, and sometimes mouth ulcers or fever. When mouth ulcers develop with herpesvirus, drooling follows for the same reason it does with calicivirus: the ulcers make the mouth too sore to swallow normally.
Most mild upper respiratory infections clear up within one to three weeks. Bacterial infections can develop on top of the viral one, turning clear nasal discharge thick and yellow or green. In those cases, a vet may prescribe an antibiotic, typically given for 7 to 10 days. These antibiotics don’t kill the virus itself but control the secondary bacterial infection that’s making things worse.
Dental Disease and Mouth Inflammation
If the sneezing and drooling have been going on for weeks or months rather than days, dental disease is a strong possibility. Cats can develop a severe inflammatory condition of the gums and mouth lining called chronic gingivostomatitis. The entire mouth becomes red, swollen, and painful, leading to heavy drooling, reluctance to eat, and weight loss. Calicivirus has been found in about 60% of cats with this condition, compared to roughly 24% of healthy cats, suggesting the virus plays a role in triggering or sustaining the inflammation.
The connection to sneezing is less obvious but real. Severe oral inflammation can extend into the back of the throat and nasal passages, and the same viruses driving the mouth disease can simultaneously irritate the nasal lining. Cats with advanced periodontal disease sometimes develop openings between the tooth root and the nasal cavity, which directly causes sneezing and nasal discharge on one side.
Toxic Plant Exposure
If the drooling and sneezing started suddenly, within the past few hours, and your cat had access to houseplants, toxic plant ingestion is a real concern. Several common indoor plants contain microscopic needle-shaped crystals that pierce the mouth and throat on contact, causing immediate burning, swelling, and heavy salivation. The irritation can extend to the nasal passages, triggering sneezing and coughing.
The biggest offenders belong to the aroid family, which includes many of the most popular houseplants:
- Dieffenbachia (dumb cane)
- Philodendron
- Monstera
- Peace lily
- Pothos (devil’s ivy)
- Caladium
Other plants cause similar mouth irritation through different compounds. English ivy contains saponins that cause burning in the mouth, drooling, vomiting, and coughing. Dracaena, snake plants, and bulb plants like tulips and daffodils also trigger salivation and oral irritation. If you suspect your cat chewed on any of these, check for swelling around the lips or pawing at the mouth.
Foreign Bodies and Polyps
Cats sometimes get small objects lodged in the nasal passages or the back of the throat. Blades of grass are a classic culprit. A foreign body closer to the front of the nose typically causes sneezing and nasal discharge, while something stuck in the back of the throat triggers gagging, retching, and noisy breathing. Either location can cause drooling if the cat is uncomfortable swallowing. Foreign bodies are actually the third most common cause of nasal disease in cats, and they can cause increasingly foul-smelling discharge if they remain stuck for days.
Nasopharyngeal polyps are another possibility, particularly in young cats and kittens. These are benign growths that develop from the lining of the middle ear or the tube connecting the ear to the throat. They can extend into the back of the nasal cavity, causing noisy breathing, nasal discharge, and difficulty swallowing that leads to weight loss. Polyps are often initially mistaken for a respiratory infection because the symptoms overlap so much. The key difference is that a polyp won’t resolve on its own, and antibiotics won’t fix it.
What the Symptoms Look Like Together
The pattern of the symptoms can help you sort out what’s going on before you get to the vet. A sudden onset of both drooling and sneezing in a previously healthy cat, especially with eye discharge or fever, points toward an upper respiratory infection. Sudden drooling with mouth swelling or pawing at the face, particularly if you have houseplants, suggests toxic exposure. Gradual onset over weeks, with worsening bad breath and reluctance to eat, leans toward dental disease. Sneezing from only one nostril, with discharge on just one side, raises concern about a foreign body, polyp, or in older cats, a nasal tumor.
Your vet will start with a physical exam of the mouth and throat, often under light sedation since cats with mouth pain resist having it pried open. If an infection is suspected, swabs from the mouth and nose can be tested to identify the specific virus or bacteria involved. In cases where symptoms persist or worsen despite treatment, imaging of the skull and nasal passages can reveal polyps, foreign bodies, or bone destruction that would change the diagnosis entirely.
What You Can Do at Home
If your cat is congested and having trouble breathing through its nose, you can create a steam session by running a hot shower and sitting with your cat in the steamy bathroom for 10 to 15 minutes. The humidity helps loosen mucus and makes breathing easier. Stay with your cat the entire time.
Cats that can’t smell their food often refuse to eat. Warming wet food slightly can release more aroma and encourage eating. Keeping the nose clear of dried discharge with a warm, damp cloth also helps. Make sure fresh water is easily accessible, since dehydrated cats recover more slowly.
A cat that is drooling and also refusing to eat, hiding, breathing with its mouth open, acting lethargic, or vomiting needs veterinary care soon rather than a wait-and-see approach. If you suspect your cat ingested a toxic plant or is struggling to breathe, that warrants an emergency visit the same day.