Stomatitis is a painful inflammation of the mouth's soft tissues — gums, tongue, inner lips, and sometimes the back of the throat. In cats, it can make eating, grooming, and day-to-day comfort a real struggle. The exact cause isn't fully understood, but the most effective treatment is usually dental extractions, and most cats improve significantly afterward. Here's what pet parents need to know.
What Is Stomatitis in Cats?
Stomatitis — also called feline chronic gingivostomatitis (FCGS) — is a condition where the soft tissues inside the mouth become severely inflamed. According to VCA Animal Hospitals¹, the inflammation can affect the gums, tongue, inner surface of the lips, the floor and roof of the mouth, and sometimes the throat. That makes it far more widespread than routine dental disease, which typically stays confined to the gum line.
The condition is painful enough to change a cat's behavior noticeably. A cat that was once social, active, and well-groomed may become withdrawn, unkempt, and unwilling to eat.
What Are the Signs of Stomatitis in Cats?
Cats tend to hide discomfort, so stomatitis can progress before pet parents notice something is wrong. Feline stomatitis symptoms to watch for include:
Drooling — often the earliest visible sign; can be excessive
Bad breath — a strong, persistent odor that doesn't improve with normal dental care
Difficulty eating — pawing at the mouth, dropping food, or refusing meals entirely
Weight loss — the result of eating less due to ongoing oral pain
Poor coat condition — grooming requires the mouth; when it hurts, cats stop
These signs overlap with other dental conditions, so a veterinary exam is the only way to confirm stomatitis specifically.
What Causes Stomatitis in Cats?
The exact cause isn't fully known. What veterinarians understand is that the immune system appears to overreact — likely to bacteria in dental plaque — triggering severe inflammation throughout the mouth.¹ Cats with feline immunodeficiency virus (FIV) or feline leukemia virus (FeLV) may have higher susceptibility, though stomatitis also affects cats with no underlying viral disease.
Because there's no single confirmed trigger, there's no guaranteed way to prevent it. Keeping the mouth as clean as possible is the best step pet parents can take to reduce the bacterial load that may set the condition off.
How Is Stomatitis Diagnosed?
A veterinarian will typically:
Review symptoms and history — how long symptoms have been present, any changes in eating or behavior
Perform a full oral exam — assessing the severity and extent of tissue inflammation
Run blood and urine tests — to rule out systemic conditions like FIV, FeLV, or kidney disease that can present with similar signs
Take dental X-rays — to evaluate tooth root health and bone condition, which guides treatment planning¹
Many cats need sedation for a complete oral exam because their mouths are too painful to examine while fully awake. If your cat is showing signs of oral discomfort, don't delay the appointment — stomatitis that goes untreated can become dangerous quickly.
How Is Stomatitis in Cats Treated?
Dental extraction is the most effective treatment for stomatitis in cats. According to VCA Animal Hospitals¹, removing some or all of the teeth has the greatest documented effect on the condition. In severe or treatment-resistant cases, full-mouth extraction may be recommended from the start.
The results are often significant. PetMD² reports that approximately 90% of cats experience complete or near-complete symptom resolution after extraction surgery. Cats adapt well to living without teeth — most resume eating comfortably on a wet or softened food diet within a few weeks of recovery.
For cats who can't undergo extraction right away, or when surgery provides only partial relief, veterinarians may use medical management to control symptoms:
Anti-inflammatory medications and pain relievers
Antibiotics — to reduce bacterial load in the mouth
Chlorhexidine rinses or gels — used at home or during professional cleanings
Frequent dental cleanings under anesthesia
Medical management alone is rarely curative. Most cats managed without extraction continue to experience flare-ups and require ongoing treatment.
One important warning: untreated stomatitis can become life-threatening. Cats in severe oral pain stop eating, which can trigger hepatic lipidosis — a dangerous liver condition that develops rapidly when cats go without food.² If your cat is avoiding meals or showing signs of mouth pain, get them seen by a veterinarian promptly.
What Does Stomatitis Treatment Cost?
Stomatitis treatment involves several cost components:
Diagnosis: Initial exam, bloodwork, and dental X-rays
Surgery: Dental extractions under general anesthesia — costs vary based on how many teeth are removed, the complexity of each extraction, and location
Recovery care: Follow-up visits, pain medication, and dietary changes
Full-mouth or near-full-mouth extractions are among the more involved dental procedures in veterinary medicine. The total can be significant. For a broader look at what dental care for pets typically costs, see how much pet dental care costs.
Pet insurance with accident and illness coverage may help reimburse a portion of eligible stomatitis expenses — including diagnostics, surgery, and follow-up care — as long as the condition isn't pre-existing at the time of enrollment. For more on how dental illness fits into a policy, see does pet insurance cover dental cleaning.
Can Stomatitis in Cats Be Prevented?
There's no guaranteed prevention since the exact cause isn't known. But reducing plaque in the mouth may lower the risk. Practical steps include:
Regular tooth brushing using cat-specific enzymatic toothpaste — daily is ideal, a few times per week helps too
Routine professional dental cleanings as recommended by your veterinarian
Dental-formulated diets or treats designed to reduce plaque buildup
Annual wellness exams — early signs of oral inflammation are easier to manage when caught before they progress
Staying consistent with preventive care is the most effective thing pet parents can do. Find out what to expect at a routine visit in how much does a vet checkup cost.
Frequently Asked Questions
What is feline chronic gingivostomatitis?
Feline chronic gingivostomatitis (FCGS) is the clinical name for stomatitis in cats — a severe inflammatory condition affecting the gums and soft tissue throughout the mouth. It's considered chronic because it tends to persist or recur without definitive treatment. Unlike routine dental disease, FCGS affects a wider area of oral tissue, causes intense immune-driven inflammation, and is significantly more painful for the affected cat.
Can stomatitis in cats be cured?
For most cats, yes — dental extractions offer the closest thing to a cure. Most cats experience significant or complete symptom resolution after full or near-full-mouth extraction surgery. Some cats require ongoing medical management if inflammation persists after surgery. Cats managed with medications alone, without extraction, typically continue to experience recurrent flare-ups rather than lasting relief.
Can cats eat normally after full-mouth tooth extraction?
Most cats adapt remarkably well. After a recovery period of a few weeks, the majority of cats eat comfortably on a wet or softened food diet. Some even manage dry food over time using their gums and tongue. Relief from chronic oral pain typically leads to noticeable improvement in appetite, weight, energy level, and grooming — outcomes pet parents often describe as transformative.
Does pet insurance cover stomatitis in cats?
Accident and illness policies generally help cover diagnosed dental illnesses like stomatitis, as long as the condition isn't pre-existing at enrollment. Coverage typically helps extend to diagnostics, dental surgery, and follow-up care for covered conditions. Routine preventive dental cleanings usually require a separate optional add-on. See is cat insurance worth it for a broader look at how coverage works for cats.
Unexpected vet bills can happen when you least expect them, but pet insurance may help make those costs more manageable. Having coverage in place can help pet parents feel more prepared for emergency care, surgery, diagnostics, and treatment for covered conditions.
Spot Pet Insurance offers dog insurance plans starting at $15/month^ and cat insurance plans starting at $9/month,^^ helping to make it easier to find coverage that fits your budget. Spot also makes filing claims simple with a digital claims process that lets pet parents submit a claim in 60 seconds or less. Get a free quote.
^ Advertised premium is based on an accident and illness plan with an 80% reimbursement rate, $500 annual deductible, and a $2,500 annual limit for a 2-year-old small mixed dog (11-25lbs) in 32009. Plan costs vary.
^^ Advertised premium is based on an accident and illness plan with an 80% reimbursement rate, $750 annual deductible, and a $2,500 annual limit for a 2-year-old mixed cat in 33801. Plan costs vary.
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VCA Animal Hospitals. "Stomatitis in Cats." VCA Animal Hospitals. https://vcahospitals.com/know-your-pet/stomatitis-in-cats
PetMD. "Stomatitis in Cats." PetMD. https://www.petmd.com/cat/conditions/mouth/c_ct_stomatitis
