What Is Feline Stomatitis? Signs Your Cat Has Mouth Pain
- Lance Baltzley, DVM
- Jan 28
- 3 min read
If you’ve ever watched your cat walk up to their food bowl, sniff it, and walk away, you know how worrying that moment can feel. For some cats, this simple hesitation is a sign of a deeply painful condition called feline stomatitis - an intense inflammation that can make eating, grooming, and even yawning hurt. The good news is that with the right care, many cats make a remarkable recovery.
Feline stomatitis is a long-term, very painful inflammation inside a cat’s mouth. It happens when a cat’s immune system overreacts to normal plaque and bacteria, causing severe redness, swelling, and ulcers. This inflammation can affect the gums, the lining of the mouth, and the very back of the mouth. Although we don’t know the exact cause, veterinarians believe stomatitis is an immune-related condition. Instead of ignoring the bacteria that normally live in the mouth, the immune system goes into “attack mode,” damaging the tissues and causing ongoing irritation. Factors that may contribute include dental plaque, certain viral infections, a cat’s genetics, and how their immune system functions.
What to Watch For
Cats with stomatitis are often in significant pain, even if they try to hide it. You may notice:
Very bad breath
Drooling (sometimes thick or blood-tinged)
Difficulty chewing or dropping food
Eating less or losing weight
Pawing at the mouth
Acting irritable, withdrawn, or less social
A messy or unkempt coat because grooming hurts
In more severe cases, some cats will stop eating completely. However, many cats will continue to eat even with severe pain until late in the disease.
How Feline Stomatitis Is Diagnosed
Because the mouth is so painful, your veterinarian may need to perform an oral exam under sedation or anesthesia. Diagnosis often includes:
A full oral examination
Dental X-rays to check the roots and jaw bone
Testing for viral diseases (FIV/FeLV)
Sometimes a biopsy to rule out other conditions
The key finding is intense inflammation that extends into the back of the mouth.
Treatment Options
Stomatitis can be challenging to treat, and most cats need a combination of therapies. The main goal is to reduce inflammation and help your cat eat, groom, and live comfortably again.
Dental Extractions
For many cats, removing most or all of the teeth is the most effective treatment. While this sounds drastic, it greatly reduces the amount of plaque and bacteria that trigger the immune response.
About 60–80% of cats improve significantly after extractions
Some cats experience complete relief
Others may still need some ongoing medical support
Most cats eat better, feel better, and live happier lives after they heal from surgery.
Medical Management
Medications may also be used, especially before or after surgery, or when surgery isn’t an option right away. This may include:
Pain medications
Anti-inflammatory or immune-modulating medications
Antibiotics if there’s a secondary infection
Medication alone usually isn’t enough for long-term control, and long-term use can come with side effects.
Supportive Care at Home
Your veterinarian may also recommend:
Soft or prescription diets
Regular monitoring of appetite and weight
Reducing stress in the home
Routine follow-up visits
What to Expect Long-Term
Every cat responds differently to stomatitis treatment. Many experience dramatic improvement after extractions and enjoy a much better quality of life, while others may need occasional or ongoing medical support. There is no guaranteed prevention, but starting your cat early on home dental care is good for every kitty. What’s most important is early diagnosis, appropriate treatment, and regular follow-up care. With the right plan in place, most cats with stomatitis can return to comfortable, happy lives!
If you notice signs of stomatitis in your cat or if they seem uncomfortable while eating, don’t hesitate to reach out to your veterinary team. We’re here to guide you through diagnosis, treatment, and long-term care to help keep your cat feeling their best.
