Introduction

Feline stomatitis, or Feline Chronic Gingivostomatitis (FCGS), is a severe, debilitating, and incredibly painful inflammation of the gums and the soft tissues lining a cat’s mouth. Unlike standard gingivitis, which primarily affects the gums directly surrounding the teeth, stomatitis extends far into the mucous membranes, often reaching the back of the throat (the fauces) and the tongue. Because this condition causes such intense and chronic pain, it fundamentally alters a cat’s behavior, leading to severe difficulty eating, grooming, and maintaining a normal, happy quality of life.

Feline Stomatitis

  • Common Signs: The clinical signs of stomatitis are overwhelmingly driven by oral pain. You may notice your cat dropping food, chewing on one side of their mouth, vocalizing when trying to eat, or running away from their food bowl entirely out of fear of the pain. Bad breath (halitosis) is typically very pronounced. Other key signs include excessive, often thick or blood-tinged, drooling; a highly unkempt haircoat (because grooming hurts the mouth); sudden weight loss; and behavioral shifts such as withdrawing, hiding, or displaying unusual irritability. Visually, the gums and back of the throat will appear fiery red, swollen, and ulcerated.
  • Cause: While the exact underlying cause of feline stomatitis remains a complex veterinary mystery, it is universally recognized as an extreme, hypersensitive immune system response to the normal plaque and bacteria that accumulate on the teeth. Contributing factors often include underlying viral infections, particularly Feline Calicivirus (FCV), as well as systemic immunosuppressive diseases like Feline Leukemia Virus (FeLV) or Feline Immunodeficiency Virus (FIV). Genetics, environmental stressors, and concurrent dental diseases (such as periodontal disease or tooth resorption) also play a major role in triggering this aggressive inflammatory cascade.
  • Treatment Options: Medical management (using long-term antibiotics, pain medications, or steroids) is rarely a permanent solution and often loses effectiveness over time, alongside carrying systemic side effects. The current gold-standard treatment, and often the only path to a cure, is a professional dental procedure to perform partial or full-mouth tooth extractions. By removing the teeth—which act as the anchor for the offending plaque—the immune system is no longer constantly triggered. Following the extractions, targeted pain control and antibiotics are utilized. For cats whose symptoms persist post-extraction, advanced immunosuppressive therapies (such as cyclosporine or steroids) or targeted laser therapies may be considered.
  • Home Care & Monitoring: During flare-ups or in the post-operative recovery period, it is crucial to feed an ultra-soft, canned food diet or soak dry kibble in warm broth or water to minimize the need to chew. Carefully monitor their daily food intake, hydration, and body weight. Administer all pain-relief and antibiotic medications exactly as prescribed, and ensure you attend all recheck appointments so your veterinarian can evaluate healing progress. Contact the clinic immediately if appetite vanishes, drooling significantly worsens, or signs of intense oral pain return.

This blog is for informational purposes only and is not intended to provide diagnostic or treatment guidance. If you have any concerns about your pet’s health, please contact Cascade Heights Veterinary Center directly by phone at 206-403-1108,  email, or by scheduling an appointment.  Medications, supplements, and prescription diets can be conveniently ordered through our online pharmacy.