Mouth Inflammation and Ulcers in Cats
Written By hannah hollinger
Published: 10/08/2016Updated: 01/21/2022
Veterinary reviewed by Dr. Linda Simon, MVB MRCVS
Mouth Inflammation and Ulcers in Cats - Symptoms, Causes, Diagnosis, Treatment, Recovery, Management, Cost
What are Mouth Inflammation and Ulcers?
Ongoing mouth inflammation and ulcers in cats is termed feline 'stomatitis', characterized by gradually worsened inflammation of the oral mucosal tissues. Feline stomatitis etiology is assumed to be an immune-mediated disease caused by dental disease and viral infections, such as feline herpesvirus and feline calicivirus. Ongoing mouth inflammation and ulcers only affect about 3 percent of the feline population with purebred cats being the majority of those affected. Feline stomatitis, although rare, is a very serious and painful disease for cats that can eventual becoming life-threatening if it is left untreated. 
Mouth inflammation and ulcers in cats create an extremely painful condition. A cat with this condition may have a difficult time eating or drinking, may have bad breath, drool, and paw at her face. Mouth inflammation often causes a cat’s mouth to develop ulcers on the palate, gums, tongue or lips, which may even prevent the cat from opening her mouth. Mouth inflammation and ulcers are not linked to a single underlying cause, but dental disease is believed to be the main culprit. Mouth inflammation and ulcers in its early stages resembles dental disease and causes pain, making an appointment with the veterinarian essential. 
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Average Cost
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Symptoms of Mouth Inflammation and Ulcers in Cats
Mouth inflammation and ulcers in cats is one of the very few conditions that will cause a feline to show obvious signs of pain. It is in a cat’s nature to not freely express pain, but feline stomatitis is so painful cats often cry out in pain with a simply yawn. Cat owners also report a type of behavior veterinarians call, “approach-avoidance.” This behavioral term is used to describe a cat who hungrily approaches her food, only to hiss at her bowl and run away. Approach-avoidance behavior is a symptom that develops over time as the feline anticipates the consumption of food to be painful. Behavioral changes may be the first signs of feline stomatitis a cat owner notices, as inflammation and ulcers in the mouth are not easily seen. The following additional symptoms may also be noted in a cat with mouth inflammation and ulcers: 
  • Severe pain
  • Vocalization or crying out upon the opening of the mouth
  • Dropping food while eating
  • Refusal to eat or drink
  • Facial pawing
  • Weight loss
  • Halitosis (bad breath) 
  • Dysphagia (difficulty swallowing)
  • Ptyalism (hypersalivation, drooling)
  • Poor hair coat
  • Red, swollen gums and/or mouth
  • Visible ulcers or lesions 
Causes of Mouth Inflammation and Ulcers in Cats
The exact cause of mouth inflammation and ulcers in cats is unclear, but what is clear is that the condition appears to be immune-mediated. In other words, feline stomatitis is believed to be an overreaction of the immune system, causing the feline’s own immune system to attack bacteria in the mouth as well as its oral tissues. The immune system is triggered by plaque in the mouth, making feline dental disease the prime suspected cause. Mouth inflammation and ulcers in cats can be caused by dental disease, but also infection and viruses, including: 
  • Bartonellosis
  • Feline calicivirus (FCV)
  • Feline herpesvirus-1 (FHV-1)
  • Feline immunodeficiency virus (FIV)
  • Feline leukemia virus (FeLV)
Diagnosis of Mouth Inflammation and Ulcers in Cats
Diagnosis of mouth inflammation and ulcers in cats begins with an examination of your cat’s medical history, including dental records and procedures to rule out standard conditions of the teeth. A physical examination of the mouth will be completed in order to evaluate the level of ulceration. Sedation or a general anaesthetic may be needed to allow the veterinarian to properly examine the feline’s mouth. A visual identification of mucosal inflammation and ulcers will give the veterinarian a diagnosis, but to determine the cause, further testing will be made including: 
  • Systemic disease evaluation (detection of organ disease)
  • Virus isolation test (detection of virus)
  • Retroviral test (detection of immune-related virus)
  • Histopathological evaluation (detection of oral disorders)
  • Biopsy (detection of oral neoplasia) 
Treatment of Mouth Inflammation and Ulcers in Cats
Treatment of mouth inflammation and ulcers in cats initially begins with pain control and anti-inflammatory medication. Feline stomatitis is an overreaction of the immune system, so your veterinarian may prescribe a steroid or immunosuppressant drug to suppress the immune system, and suppress the disease. Medicated mouth washes and oral antibiotics may also be prescribed. Although effective, treating feline stomatitis with therapeutic drugs is only temporary, therefore, many veterinarians suggest total dental extractions. Sometimes all teeth are removed while, in other cases, the incisors and canines may be left.
Plaque is the known trigger of feline stomatitis. Plaque is a bacteria that only remains in the mouth when it adheres to the teeth. Rigorous dental care at home (regular tooth brushing, feeding a dental diet and the use of certain products like mouthwash) can help keep the disease at bay.
For many, dental extraction is the only potential cure of feline stomatitis. Sometimes, all premolars and molars are removed. In more severe cases, all teeth are taken out. Unfortunately, a total dental extraction is costly, drastic and in the end, may not cure your cat’s stomatitis. 
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Recovery of Mouth Inflammation and Ulcers in Cats
The refractory nature of mouth inflammation and ulcers in cats makes recovery as well as management of the condition frustrating to both parties. Pain management will be continuous for cats with feline stomatitis to improve the quality of their life. A soft food diet will be required for cats who have undergone total dental extractions and routine dental cleanings may be required of those who have not.
Mouth inflammation and ulcers can be expensive to treat. To avoid high vet care expenses, secure pet health insurance today. The sooner you insure your pet, the more protection you’ll have from unexpected vet costs. 
Mouth Inflammation and Ulcers Average Cost
From 455 quotes ranging from $200 - $2,000
Average Cost
$850
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Mouth Inflammation and Ulcers Questions and Advice from Veterinary Professionals
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Mainecoon
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15 weeks
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My pet has the following symptoms:
Red Sores In Mouth, Fever, Salvation
Hello. I have a kitten who was diagnosed with Calicivirus. Not one other kitten or adult cat in my cattery has this virus so i am wondering if he was misdiagnosed. He had been on amoxicillin for weeks and eye drops and the new owner is telling me he isn’t getting better and needs more antibiotics. It’s my understanding that the virus can’t be treated with antibiotics so I’m wondering if it could be something else. And also what long term effects can antibiotics have on a kitten.
July 23, 2020
Answered by Dr. Michele K. DVM
0 Recommendations
Thank you for your question. Calicivirus is a very common virus in Catteries, and can cause a lot of problems that lead to bacterial infections. If your kitten is responding to antibiotics, that is probably the right therapy, as viruses can open the susceptibility to bacterial infection. Many kittens need antibiotic therapy to overcome these infections, and the long-term effects of antibiotics are none. I hope that the kitten does well.
July 23, 2020
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Tortoiseshell cat
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2years
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1 found this helpful

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1 found this helpful

My pet has the following symptoms:
Redness
My cat got a ulser on her gum I was wondering if you could help
July 12, 2020
Answered by Jessica N. DVM
1 Recommendations
Your cat needs to see a veterinarian to have the ulcer evaluated. They will be able to assess whether there is infection present and prescribe medications to help her heal. I hope she feels better soon.
July 12, 2020
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ASH
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Tink
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21 Years
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0 found this helpful

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My pet has the following symptoms:
Strange Drinking Behavour
My 21 year old cat has developed the strangest behaviour when drinking water. She doesn't lap it up with her tongue any longer. She puts her whole muzzle into the water and when she pulls it out she kind of sucks water in. Then she snorts to clear her nose. She repeats this often over up to 10 mins. Have you ever seen this behaviour? Could it be an ulcer on her tongue, making her not want to stick her tongue out? She has been on liquid methamazole (hyperthyroid) for 3 years now could it be irratating her mouth/tongue?
Sept. 10, 2018
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domestic short hair
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Kitten
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8 Weeks
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0 found this helpful

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My pet has the following symptoms:
Bad Breath
Ulcers
Dropping Stool As Walks
I got a kitten on Friday and Saturday morning I noticed that she had really bad breath and was drooling. I opened her mouth and on her tongue she has a spot that looks raw, not sure if it is a ulcer or not. She ate a little bit of dry food Friday night, a little bit Saturday and some wet food. I put water in her dry food and she has eaten like three kibbles. I gave her wet food tonight and she ate that. Her energy level was low yesterday but seems better today. The lady I got her from said that she started them on dry food. So I don’t think she slowly transitioned them to hard food. Can dry food cause it to be raw and then smell or is something else going on? I’m just not sure what to do.
Sept. 9, 2018
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Russian Blue
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Taco
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6 Months
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My pet has the following symptoms:
Tired
Hissing
Red Spot
Smelly Saliva
Hello, my family and I took in a new kitten. He was found in our neighbors carport and has been living with us 2 weeks. He is very playful and likes to bite. We thought he was younger, so we were holding off to get him neutered for about a month or so. Well last night he started all the sudden growling and hissing if we tried to touch him. So we took him to the vet. We found out he is probably 6 months old. But the reason I am writing to you, is the vet said they are not sure what is wrong with him, but he does have a red spot in his mouth. Also his saliva has been stinky. Do you have any ideas of what could be wrong with him? Is everything related?
Sept. 8, 2018
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Gray Shorthair
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Gummy
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3 Years
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My pet has the following symptoms:
Gagging At Sight Of Food
Licking At Mouth
Pawing Into Mouth
I recently adopted a cat who got a complete teeth extraction after having ulcers and gingivitis. She had her teeth extracted on 4/26/19, and now at 5/17/19 she hardly drinks any water. Today when getting her food, she started gagging and moving her mouth like something was stuck inside. I wasn't able to look into her mouth. She also has been pawing at her mouth and got her paws completely wet from it. She is now laying down, acting fine but a bit uncomfortable. I wonder what could be happening orally even after having a full tooth extraction that went well and she has recovered from.
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Syberian- short hair
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Paco
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9 Years
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My pet has the following symptoms:
Smells
Red Tongue
Spits Food
Red Spots On Tongue
I’m unsure if this is what my cat has but I have high suspicions. My cat is old and usually doesn’t have too many health issues, however lately (around 3 days ago now), although he has appetite he doesn’t eat much. He finishes his bowls but at slower rates. His tongue has red spots and what look like cuts. He spits his food out, even if he still eats it later. His breath also smells different, I feel like he grooms himself a lot more as his whole face smells of saliva, which doesn’t smell the usual cat food way I’d expect. He does still seem happy, putting and loving cuddles. I sure do hope it means he isn’t in any pain.
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La Prem Cat
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Tabby
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9 Years
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My pet has the following symptoms:
Ulcers
My baby Tabby is a 9 yr old male Tabby cat i took him to the vet bc of drooling not eating or drinking. They said be had ulcers on his tongue they give him an antibiotic. He doesn't drool as much and he started drinling water yesterday but he's not eating and it's been almost a week and i can't afford to take him back to the vet bc I'm not working and now on disability. What can i do to get him to eat liquids to bring his strength up.
Mouth Inflammation and Ulcers Average Cost
From 455 quotes ranging from $200 - $2,000
Average Cost
$850
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