Cat Gingivitis vs Stomatitis: Differences Guide (2026)

Two of the most confusing feline oral conditions are gingivitis and stomatitis. Both cause painful, inflamed mouths — and both scare cat owners when they first spot red gums. But they're different diseases with very different treatments, and telling them apart matters enormously for your cat's comfort and long-term health.

Gingivitis is inflammation of the gums around the teeth; stomatitis is a deeper, more severe immune-driven inflammation of the entire mouth lining. As the American Veterinary Medical Association (AVMA) notes, stomatitis is one of the most painful oral conditions in cats and often requires advanced care. This guide breaks down the differences, symptoms, and treatment options so you know what you're dealing with.

What Is Cat Gingivitis?

Gingivitis is the earliest, most common stage of dental disease. It's caused by plaque — a sticky film of bacteria that builds up on teeth. When plaque isn't removed, it irritates the gums, causing redness, swelling, and sometimes bleeding. Gingivitis is reversible with consistent at-home cleaning and professional veterinary care.

Key features of gingivitis:

• A red line along the gum edge where it meets the tooth
• Swollen, sometimes bleeding gums, especially when eating
• Caused by plaque buildup, not an immune problem
• Reversible with good dental care if caught early
• Progresses to periodontitis if left untreated

What Is Cat Stomatitis?

Feline stomatitis (lymphocytic plasmacytic stomatitis) is a severe, painful inflammation of the mouth that goes far beyond the gumline. It's thought to be an abnormal immune reaction to dental plaque — the cat's own immune system overreacts and attacks the tissues of the mouth. Stomatitis can affect the gums, the lining of the cheeks, the tongue, and the back of the throat.

Key features of stomatitis:

• Intense, widespread redness and ulceration across the mouth
• Severe pain — cats often drool, refuse food, and lose weight
• An immune-mediated condition, not just plaque buildup
• Does not reliably improve with cleaning alone
• Often recurs and may require extraction or immune therapy

Gingivitis vs Stomatitis: Key Differences

How to Tell Which One Your Cat Has

The biggest clue is how red the mouth is and how much pain your cat shows. A cat with early gingivitis might show a thin red line on the gums but still eat, play, and groom normally. A cat with stomatitis is usually obviously miserable — reluctant to eat, drooling, pawing at the mouth, and losing weight.

See a veterinarian for a diagnosis, especially if you notice:

• Painful red or ulcerated patches on the cheeks or tongue
• Severe drooling (sometimes tinged with blood)
• Refusing dry food or crying when eating
• Bad breath paired with visible mouth sores
• Weight loss or decreased grooming

Managing Gingivitis at Home

If your cat has mild gingivitis, consistent at-home care can reverse it and prevent progression to periodontitis. The goal is simple: remove plaque daily before it hardens into tartar.

• Wipe teeth and gums daily with soft dental finger wipes — gentle enough for sensitive gums but effective at catching plaque
• Add an enzymatic dental cleaning powder to meals to break down plaque on back teeth
• Offer dental-friendly food and treats that provide mechanical cleaning
• Schedule regular professional cleanings as recommended by your vet

Treating Stomatitis: What to Expect

Stomatitis is much harder to treat. Because it's an immune reaction, cleaning alone usually isn't enough. Treatment plans are individualized and may include:

• Pain and anti-inflammatory medications for flare-ups
• Antibiotics to control secondary infection
• Full-mouth or partial tooth extraction — the most effective long-term option, as removing plaque-covered teeth removes the trigger
• Immune-modulating treatments for cats that don't respond well

The AVMA and many veterinary dentists consider extraction the most effective and humane treatment for severe stomatitis, because it eliminates the source of the reaction. While the idea of extractions is daunting, most cats feel dramatically better afterward and regain appetite and quality of life.

FAQ

Can gingivitis turn into stomatitis?

While both involve oral inflammation, stomatitis isn't simply "advanced gingivitis." Stomatitis is a different, immune-driven disease. However, cats with chronic dental disease are more likely to develop stomatitis, which is why early gingivitis treatment matters so much.

Is stomatitis contagious?

No. Stomatitis isn't spread from cat to cat. It's an individual immune response to dental plaque, not an infectious disease, although some studies suggest certain viruses like feline calicivirus may play a role in susceptible cats.

Will my cat need all their teeth removed for stomatitis?

Not always, but full-mouth extraction is the most effective long-term treatment for severe cases. Many veterinarians start with medication and partial extractions, and escalate to full-mouth extraction if the cat still suffers. Most cats do extremely well after extraction and recover their appetite.

How can I prevent gingivitis in my cat?

Daily plaque removal is the foundation of prevention. Wipe teeth and gums every day, add an enzymatic powder to food, feed dental-friendly diets, and keep up with professional cleanings. Starting these habits early gives your cat the best chance of avoiding periodontal disease.

Conclusion

Gingivitis and stomatitis may both inflame your cat's mouth, but they're very different diseases. Gingivitis is a common, reversible plaque problem you can manage with daily home care; stomatitis is a painful immune condition that usually needs veterinary treatment, sometimes including extraction. If you notice red gums, drooling, or a painful mouth, see your veterinarian — the sooner you get an accurate diagnosis, the sooner your cat can be comfortable.