Addressing The Root Of The Problem: How To Navigate Feline Chronic Gingivostomatitis

February 12, 2026

While an animal’s immune system is important for protecting them from bacteria, viruses, and other forms of disease, it can sometimes go overboard. In these cases, the immune system can destroy vital cells, like red blood cells and platelets. In other cases, it can create harmful inflammation in the body.

Feline chronic gingivostomatitis (FCGS) is a disease in cats in which the immune system overreacts to plaque on the teeth, causing ulcers in the mouth, swelling, and even bleeding the gums and tissues in the mouth.

Dr. Leah Taylor, a clinical assistant professor at the Texas A&M College of Veterinary Medicine & Biomedical Sciences, discusses the signs and symptoms of FCGS and how owners can support their cats after diagnosis.

See It, Treat It

FCGS is relatively rare, occurring in less than 12% of cats, but it is extremely painful for the animal. While there is no direct cause, cats will have clear symptoms that stem from significant inflammation and pain in the mouth. 

Symptoms indicating that it is time for a check-up include:

• Loss of appetite 
• Drooling
• Redness and ulcers inside the mouth
• Blood in the saliva

Owners may also notice more subtle changes of oral pain, such as the cat running from their food bowl when eating and a reluctance to have their face touched.

“It causes pretty extreme ulcerations, swelling, and pain,” Taylor said. “Treating it is essential.”

These clinical signs, in addition to an oral exam, allow the veterinarian to form a diagnosis. The veterinarian will likely collect a biopsy of the tissue at the time of surgery to rule out cancer and to support the diagnosis.

Because of this, if an owner notices any symptoms of FCGS, it’s vital to have their cat examined — the condition will not improve without treatment.

Trust The Process

The successful treatment of FCGS is usually done by a veterinary dentist and always begins with the extraction of most or all of the cat’s teeth. Managing the cat’s pain is also essential after diagnosis. Because the teeth are the main source of plaque, it is essential to remove every part of the tooth.

“To achieve significant improvement, tooth extractions must be the first step in treatment,” Taylor said. “You can’t leave any piece of the tooth behind. It can be a long initial procedure.”

After extraction, about two-thirds of cats will show complete or substantial resolution of symptoms. About 25% of cats may require extra medication to aid the healing process, but most completely recover within months.

“Most cats show an improved quality of life after the procedure,” Taylor said. “They don’t need their teeth as much as we think they do; they can still have a good quality of life after extractions.”

The Road To Recovery

Once the teeth are removed, the next step will include monthly appointments to evaluate healing. For the first month, the stitches inside the cat’s mouth will continue to hold plaque; as a result, the animal may not show significant improvement until the stitches fall out.

“After the procedure, the patient will have to eat wet food or crunchy food soaked in water,” Taylor said. “Once oral inflammation improves and the surgery sites have healed, they may return to regular food and play, depending on the cat. Owners will also want to keep them indoors so they’re not roaming outside without teeth.”

Since the cause of FCGS is unclear, there are no definitive preventative measures owners can take. Instead, it’s important to pay attention to your cat’s behavior and, if symptoms appear, have your cat examined and treated by a veterinarian as soon as possible.

A full teeth extraction may seem like a tough procedure for the animal and the owner, but it’s incredibly important in ensuring that the cat can live the best life possible.

“People have to have a little faith in the process to go forward with it,” Taylor said. “Once everything is healed, you should start to see the return of some of those natural cat behaviors that were lost because of the extreme pain they were in. Every case has varying degrees of improvement, but, overall, there is a huge improvement in quality of life.”

Pet Talk is a service of the College of Veterinary Medicine & Biomedical Sciences, Texas A&M University. Stories can be viewed on the web at vetmed.tamu.edu/news/pet-talk. Suggestions for future topics may be directed to vmbs-editor@tamu.edu.

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