Dog & cat health · Vet-reviewed guide

Cat Stomatitis: The Painful Mouth Condition and Why Extractions Help

Stomatitis is one of the most painful things a cat's mouth can go through — the immune system attacking the mouth itself. A cat that suddenly won't eat may be telling you exactly this.

Quick answer: Cat stomatitis, or feline chronic gingivostomatitis, is a severe, extremely painful inflammation of the mouth in which a cat's immune system overreacts to plaque, causing widespread ulceration and swelling far beyond ordinary gingivitis. Affected cats are genuinely suffering: they often drool, stop eating or cry when they try, paw at the mouth, lose weight, and let their coat become unkempt because grooming hurts.

If a vet prescribes an antibiotic: our licensed veterinarian can review your pet and, when appropriate, provide clindamycin for dogs & cats — the prescription is included at no separate cost, and you pay only for the medication.

This is not a condition that home care or a course of antibiotics can fix. The single most effective treatment is the removal of teeth, often most or all of them, because taking away the surfaces that hold plaque removes the trigger for the immune reaction, and many cats become comfortable and eat well afterward, even without teeth. Because stomatitis is so painful and does not resolve on its own, a cat with these signs needs veterinary care without delay.

How stomatitis differs from ordinary gingivitis

Regular gingivitis is inflammation of the gums along the tooth line. Stomatitis is a much more severe, immune-driven inflammation that spreads across the gums, the back of the mouth, and other soft tissues, causing raw, ulcerated, bright-red areas.² The pain is often out of proportion to what an owner would expect, and it is one of the most uncomfortable conditions cats experience.

Signs to take seriously

• Drooling, sometimes blood-tinged
• Crying out or dropping food while eating, or refusing to eat
• Pawing at the mouth and reluctance to be touched near the face
• Weight loss and a scruffy coat from stopping grooming
• Very red, ulcerated tissue at the back of the mouth²

Why extractions are the main treatment

It seems drastic, but removing teeth is the most effective treatment for stomatitis, and it is what gives most cats lasting relief.¹ Because the immune system is reacting to plaque on the teeth, taking the teeth out removes the trigger. Many cats do very well afterward and eat comfortably, including dry food, with few or no teeth. Medications to manage pain and inflammation are used alongside, but on their own they usually only control the disease temporarily rather than resolving it.

The immune and viral connection

Stomatitis is linked to an over-reactive immune response, and some cases are associated with viral infections such as calicivirus or the immune-weakening viruses FIV and FeLV.² Whether testing or additional treatment for these is needed is a decision for your vet based on your individual cat.

Living with a stomatitis cat

Management is often long-term, and it centers on veterinary treatment rather than home remedies, which cannot touch this condition. Do not attempt to manage a stomatitis cat with over-the-counter products or essential oils, which are toxic to cats and offer no benefit here.¹ Any prescribed medication comes through your vet. See how our vet prescription service works.

When to see a vet

A cat that is drooling, struggling or refusing to eat, or losing weight needs to be seen promptly, because the pain is significant and the condition will not improve on its own.² Early treatment spares a great deal of suffering.