Feline gingivostomatitis: the most painful mouth inflammation
Feline chronic gingivostomatitis is one of the most painful diseases a cat can have, and one of the most frustrating for its owners. It is not tartar or ordinary gingivitis, and antibiotics will not fix it. The treatment with the best results, however harsh it sounds, is extracting teeth, and most cats feel better almost immediately.
What it is
It is a chronic, intense inflammation of the lining of the mouth. It is not limited to the gums around the teeth, as in ordinary gingivitis, but spreads to the back of the mouth, to the sides of the throat (caudal stomatitis), where the lining looks red and raw, sometimes with a cobblestone appearance, and bleeds easily. It is thought to be a disproportionate immune response to dental plaque bacteria and other stimuli in a cat with some predisposition. It can appear at any adult age, including in young cats, and is more common in cats living in groups, such as those in rescues, colonies or breeding establishments.
Symptoms
Pain takes centre stage. The cat comes to the bowl hungry, tries the food, jumps back suddenly, shakes its head or cries and paws at its mouth. It eats less or only soft food, drops food, chews on one side or swallows without chewing. It drools, sometimes with blood, has very strong bad breath and stops grooming, so its coat looks dirty and unkempt, especially on the chin and chest. Many lose weight, hide and are more irritable, and some will not let you touch their face. In severe cases the cat may stop eating altogether, which is dangerous in cats because of the risk of hepatic lipidosis.
Its link with calicivirus
A very high proportion of cats with gingivostomatitis shed feline calicivirus, one of the viruses of the feline respiratory disease complex, and this virus is thought to play an important role in many cases, although it does not explain them all: some cats have calicivirus without stomatitis, and some have stomatitis without calicivirus. Infection with feline immunodeficiency virus (FIV) is also associated with the disease, and feline leukaemia can make it worse. That is why the vet will test for FeLV and FIV and may request a calicivirus PCR. The result does not change the basis of treatment, but it helps to understand the case and to protect the other cats in the house.
How it is diagnosed
The appearance of the mouth is very suggestive, but a full diagnosis requires a general anaesthetic, because a cat in so much pain will not allow a thorough examination while awake. Under anaesthetic, the vet probes every tooth with a periodontal probe, takes dental X-rays of the whole mouth (essential to see roots, resorptions and old retained roots) and takes biopsies of the inflamed lining, especially if the lesions are on one side only or atypical, to rule out squamous cell carcinoma, which can look similar. Beforehand, blood tests are done to assess anaesthetic risk and any other diseases that may coexist, such as kidney disease in older cats.
The treatment that works: extracting teeth
It may sound drastic, but it is the treatment with the best proven results and the one veterinary dentists recommend. Removing the teeth gets rid of the surface where the plaque that keeps the inflammation going builds up. The usual approach is to extract all the premolars and molars, and in some cases the canines and incisors as well, using X-rays to make sure no root fragment is left, because a forgotten fragment can keep the disease going. In published studies, most cats improve clearly after extractions and a significant proportion become symptom-free. Some take months to improve fully, and others also need medical treatment.
And cats eat without teeth
It is the question owners worry about most, and the answer is reassuring: yes. Cats barely chew; they cut their food and swallow it, and their tongue and gums adapt very well. Most cats without teeth eat wet food with no trouble at all, and many keep eating dry food, which they swallow whole or break with their gums. What usually changes is their attitude: a cat that has spent months in pain while eating starts eating eagerly, gains weight, grooms and plays again. Many owners say they have got their cat back. Immediate recovery from surgery requires pain relief and soft food for a few days.
Medical treatment: when and what for
Treatment with medicines alone does not usually resolve the disease, but it has its place. While surgery is being arranged, or in cats that cannot be anaesthetised, pain relief is used and sometimes corticosteroids or anti-inflammatories to reduce pain and inflammation, although their effect wears off over time and prolonged use has drawbacks. Antibiotics help little and only temporarily. In cats that do not fully improve after extractions, the vet may consider immunomodulating treatments, such as feline interferon omega or ciclosporin, or refer to a veterinary dentist. Stem cell therapies are being studied, with promising results that are not yet widely available.
What it costs in Spain in 2026
As a guide: consultation, €40 to €60; pre-anaesthetic blood tests, €80 to €160; FeLV and FIV test, €30 to €55; calicivirus PCR, €50 to €100; oral biopsy with laboratory work, €150 to €400. Extraction of premolars and molars with full-mouth dental X-rays, anaesthetic, pain relief and a follow-up visit usually costs €800 to €2,000, depending on the number of teeth, how difficult it is and whether a veterinary dentist does it. Full-mouth extractions can exceed that figure. Ongoing medical treatment, €20 to €80 a month. And it is worth knowing that half-measures, with courses of antibiotics and corticosteroids for years, usually end up costing more and causing more suffering.
What not to do
Do not give it human painkillers: paracetamol is fatal to cats and ibuprofen can damage their stomach and kidneys. Do not settle for round after round of antibiotics or corticosteroid injections year after year without a plan: they bring relief but no cure, and the disease progresses. Do not let more than a day go by without food before seeing the vet. Do not try to brush an inflamed, painful mouth: it will hurt and the cat will associate handling with pain. And do not feel guilty: this is not a disease owners cause by not brushing teeth, but a reaction of the cat’s own body.
Prevention and care
There is no sure way to prevent it, but there are ways to reduce the risk and catch it earlier. Up-to-date core vaccinations, which reduce the severity of calicivirus infection. FIV prevention through neutering, which reduces fighting. In multi-cat homes, avoiding overcrowding and stress. Dental check-ups at least once a year, and attention to any change in how the cat eats or in its breath. After extractions, regular check-ups to confirm the inflammation has gone. And tempting, easy-to-eat food during recovery, usually wet.
Feline gingivostomatitis is a very painful chronic inflammation of the mouth, often linked to calicivirus. Antibiotics will not cure it: the treatment with the best results is extracting the premolars and molars, and cats eat perfectly well without teeth. If your cat is in pain when eating, see the vet soon.
Educational content from Michipedia, translated from the Spanish original. It does not replace the advice of a vet or a feline behaviour specialist. Every cat is an individual.