Serious severity

Feline Gingivostomatitis

A severe, painful inflammation of the mouth and gums in which the cat's own immune system over-reacts to plaque and dental bacteria, leaving the soft tissues raw, red and ulcerated.

⚠️ Common symptoms

Severe bad breathDrooling, sometimes blood-tingedDifficulty eating or dropping foodPawing at the mouthWeight lossReluctance to be touched near the faceUnkempt coat from stopping grooming

Feline gingivostomatitis is one of the most painful conditions seen in cats, and one of the most misunderstood. Unlike ordinary dental disease, it is not simply a matter of tartar and worn teeth — it is an immune-mediated condition in which the mouth's tissues mount a furious, disproportionate reaction to the bacteria in dental plaque. The result is widespread redness, swelling and ulceration, often extending to the back of the mouth where the upper and lower jaws meet.

Cats are experts at hiding pain, but gingivostomatitis is often severe enough to break through that instinct. Affected cats may drool, approach food eagerly and then back away, cry out while eating, or stop grooming because their mouth hurts too much. Some become withdrawn or irritable. Because the disease is so uncomfortable, weight loss and a dull, matted coat are common knock-on effects.

Diagnosis is made on examination, sometimes with X-rays and biopsy to rule out other causes, alongside testing for the viral infections that so often accompany the condition. The treatment that helps most cats is, counter-intuitively, removing most or all of the teeth: with the plaque-holding surfaces gone, the immune system has nothing to react against, and the great majority of cats become comfortable and eat well again — even without teeth. Medical management with pain relief and anti-inflammatories supports the cat but rarely resolves the disease on its own.

🔍 Causes

An exaggerated immune response to dental plaque is the core problem. Chronic viral infections — feline calicivirus in particular, and FIV/FeLV — are strongly associated and worsen the inflammation.

🛡 Prevention

It cannot always be prevented, but excellent dental hygiene, regular professional cleaning and keeping calicivirus at bay through vaccination all reduce the plaque burden that drives the disease. Early veterinary attention to red or bleeding gums gives the best outcome.

💊 Treatment

There is no instant cure. The single most effective treatment is full-mouth or near-full-mouth tooth extraction, which removes the surfaces plaque clings to and resolves or greatly improves the majority of cats. Pain relief, anti-inflammatory medication and sometimes immune-modulating drugs support the mouth before and after surgery.

When to see a vet: Book a veterinary appointment promptly if your cat has severe bad breath, is drooling, or has clearly gone off eating — gingivostomatitis is intensely painful and needs professional treatment, not home care.

⚕️ Medical disclaimer

  • This information is educational only and is not a substitute for veterinary advice.
  • Symptoms overlap between conditions — only a vet can diagnose accurately.
  • Never withhold treatment or self-medicate based on information found online.
  • When in doubt, call your vet. Early intervention almost always leads to better outcomes.

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