Feline Stomatitis: Causes, Symptoms & UK Vet Advice
Feline stomatitis is severe, painful inflammation of the mouth, gums, and the tissues at the back of the throat, and it is one of the most uncomfortable conditions a cat can face. It is frequently linked to Feline Calicivirus (FCV), and treatment usually combines veterinary dental care with management of the underlying viral and immune drivers. Because the pain can be intense, early diagnosis by your veterinarian matters.
This guide explains what feline stomatitis is, why it hurts so much, how it connects to FCV, and the options UK caregivers commonly discuss with their vet.
A cat resting comfortably at home.
What is feline stomatitis in cats?
Feline stomatitis is a widespread, chronic inflammation of the soft tissues inside a cat's mouth, extending beyond the gum line into the cheeks and the area at the back of the throat. When the inflammation is centred on the gums it is often called gingivostomatitis, and the long-lasting form is known as chronic feline gingivostomatitis.
Unlike simple gingivitis, stomatitis in cats involves a strong, ongoing immune reaction. The body appears to overreact to plaque, bacteria, and viral triggers on the tooth surface, producing red, ulcerated, and often bleeding tissue.
This is why the condition is described as immune-mediated. The mouth is not just infected, it is reacting far too aggressively to what would normally be minor irritation.
What causes feline stomatitis in cats?
Feline stomatitis is usually caused by a combination of factors rather than a single trigger, with Feline Calicivirus (FCV), dental plaque, and an overactive immune response all playing a role. In many cats, no single cause can be isolated, which is part of why the condition is so persistent.
The most commonly discussed contributors include:
Feline Calicivirus (FCV): a common respiratory virus strongly associated with chronic oral inflammation and mouth ulcers.
Dental disease and plaque: bacteria along the tooth surface that keep the immune system on high alert.
Immune dysregulation: an exaggerated inflammatory response to normal oral bacteria.
Other infections: conditions such as feline immunodeficiency virus (FIV) or feline leukaemia virus (FeLV) can make inflammation worse.
You can read more about the viral side of this picture in our overview of stomatitis in cats and the FCV connection, which explains how the virus and the immune system interact.
What are the painful symptoms of feline stomatitis?
The most noticeable symptoms of feline stomatitis are severe mouth pain, drooling, and a reluctance to eat, often paired with red, ulcerated tissue at the back of the mouth. Because cats hide discomfort well, many caregivers first notice subtle behaviour changes before they see the sores.
Common signs include:
Drooling, sometimes tinged with blood
Bad breath (halitosis)
Difficulty eating, dropping food, or crying while chewing
Preferring soft food or refusing food entirely
Pawing at the mouth or face
Weight loss over time
A dull, unkempt coat because grooming has become painful
Bright red, swollen, or ulcerated tissue, especially at the back of the mouth
For a closer look at why this condition is so distressing, our article on why a cat's mouth hurts so much with stomatitis breaks down the pain mechanism in plain language.
Is feline stomatitis linked to Feline Calicivirus?
Yes, feline stomatitis is strongly linked to Feline Calicivirus (FCV), which is one of the most frequently identified viral triggers in cats with chronic oral inflammation. Studies of cats with chronic gingivostomatitis repeatedly find high rates of FCV carriage compared with healthy cats.
FCV is a highly contagious virus that spreads through saliva, nasal and eye secretions, and shared bowls or bedding. Many infected cats carry and shed it for long periods, which helps explain why oral inflammation can flare and settle again over time.
Beyond the mouth, FCV can also cause sneezing, nasal discharge, eye inflammation, and in some cats a distinctive limping syndrome. Our UK guide to Feline Calicivirus symptoms, including drooling, limping, and sores covers the fuller range of signs, and our broader FCV symptoms and spread guide explains how the virus moves between cats.
What do UK vets recommend for feline stomatitis?
UK vets typically recommend a combination of thorough dental treatment, pain relief, and management of underlying causes such as FCV, tailored to how severe the inflammation is. There is no single quick fix, and the plan is built around your individual cat.
Common steps in a veterinary plan include:
A full oral examination and dental imaging under anaesthesia to assess the teeth and surrounding tissue.
Professional dental cleaning to remove plaque and calculus that drive inflammation.
Tooth extractions where indicated, which many vets consider the most effective way to reduce the immune trigger in severe cases.
Pain management and anti-inflammatory support prescribed by your veterinarian.
Addressing infections, including antibiotics for secondary bacterial infection and management of viral drivers such as FCV.
Ongoing home dental care and monitoring to reduce future flare-ups.
Dosing and prescription decisions for pain relief, antibiotics, and any antiviral support must be made by your veterinarian, who will weigh your cat's weight, age, and overall health. If you would like a wider owner-focused overview, our UK owner guide to stomatitis symptoms and causes is a useful companion.
How is Feline Calicivirus managed alongside stomatitis?
When FCV is identified as a driver of feline stomatitis, some UK vets consider targeted antiviral support alongside dental care, using an ingredient such as EIDD-1931 for FCV-related oral disease. This does not replace dental treatment, and it does not eliminate the virus, but it may form part of a broader plan directed by your veterinarian.
EIDD-1931 is the active ingredient in the FCV-positioned CaliciX line, and it is also available as EIDD-1931 Oral Capsules. It is worth noting that EIDD-1931 is teratogenic, so it must not be used in pregnant or lactating queens, and it is not intended for cats that are not eating or defecating, or for ocular or neurological cases.
The table below shows the ground-truth details for the EIDD-1931 Oral Capsules exactly as listed. Any decision to use it should be made with your veterinarian.
Product | Active ingredient | Dosing | Duration | Price |
EIDD-1931 Oral Capsules | EIDD-1931 | 1 capsule (15 mg) per 2.5 kg body weight, every 12 hours | standard 60 days | €69.00 |
EIDD-1931 is best known within veterinary antiviral care as the oral partner to GS-441524, the antiviral at the core of CureFIP's work in Feline Infectious Peritonitis (FIP). Across the CureFIP antiviral network, more than 100,000 cats have been supported since 2019, and that experience informs how we talk about evidence, transparency, and the limits of what any single product can do.
We are clear about what the data shows and what it does not: managing FCV in a cat with stomatitis is about reducing and controlling flare-ups, not clearing the virus. Care works best as a partnership between you and your veterinarian.
Can feline stomatitis be prevented?
Feline stomatitis cannot always be prevented, but consistent dental care and reducing FCV exposure can lower the risk and severity of flare-ups. Prevention focuses on keeping the mouth as healthy as possible and limiting the triggers that inflame it.
Helpful measures include regular veterinary dental checks, home tooth brushing where your cat tolerates it, and good hygiene around shared bowls and bedding in multi-cat homes. Keeping vaccinations up to date with your veterinarian also supports overall respiratory and viral health.
FAQ
Is feline stomatitis the same as gingivitis in cats?
No. Gingivitis is inflammation limited mainly to the gums, while feline stomatitis is a more widespread and severe inflammation that extends into the cheeks and the back of the mouth. Stomatitis also involves a stronger immune reaction, which makes it more painful and harder to control.
Does every cat with stomatitis have Feline Calicivirus?
Not every cat, but Feline Calicivirus (FCV) is found far more often in cats with chronic gingivostomatitis than in healthy cats. Your veterinarian may test for FCV and other infections to help shape the treatment plan.
Do cats with stomatitis need their teeth removed?
Many cats with severe feline stomatitis benefit from tooth extractions, which UK vets often regard as the most effective way to remove the plaque surfaces that keep the immune system inflamed. Whether extractions are needed, and how many, is a decision your veterinarian will make after a full oral assessment.
Can feline stomatitis be cured completely?
There is no guaranteed way to fully resolve feline stomatitis, because it is a chronic, immune-mediated condition often linked to lifelong FCV carriage. The realistic goal is strong, lasting control of pain and inflammation, achieved through dental treatment and ongoing management with your veterinarian.
What can I feed a cat with painful mouth sores?
Soft, wet food is usually easier to eat for a cat with mouth sores, and gently warming it can make it more appealing. If your cat is refusing food entirely or losing weight, contact your veterinarian promptly, as this needs urgent attention.
If your cat is showing signs of a painful mouth, the most important next step is a conversation with your own vet, who can examine, diagnose, and build a plan around your cat. To explore the antiviral options and evidence-led approach behind our work, you are warmly welcome to learn more with the CureFIP team and bring any questions to your veterinarian.
The point about cats hiding discomfort well really stands out, since caregivers often miss early signs until weight loss or drooling appears. I wonder whether routine dental checks could catch this immune-mediated inflammation sooner, before it spreads beyond the gum line. Given how strongly FCV is linked, would testing for the virus change how a vet approaches treatment, or does management stay largely the same regardless of the trigger? That distinction seems important for owners trying to understand what to expect long term.
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