Is Stomatitis in Cats Contagious

icon May 5, 2023

What Are Mouth Ulcers in Cats?

Mouth ulcers, also known as oral ulcers or stomatitis, are painful sores that develop in a cat's mouth. They can occur on the gums, tongue, roof of the mouth, or inside of the cheeks can make it difficult for cats to eat and drink, and they can be very painful. In severe cases, the affected teeth may need to be removed to prevent further ulceration. It is important to consult with a veterinarian if you suspect your cat has mouth ulcers to determine the underlying cause and appropriate treatment plan.

Is Stomatitis in Cats Contagious?

Stomatitis in cats is not considered contagious in the sense that it is not caused by a virus or bacteria that can be transmitted from one cat to another. Stomatitis is an inflammatory condition of the mouth that is thought to be caused by an abnormal immune response to oral bacteria or viruses, which can lead to the development of painful and inflamed ulcers and sores in the mouth.

Types of Mouth Ulcers in Cats

Mouth ulcers, also known as stomatitis or oral ulcers, are a common oral health problem in cats. There are several types of mouth ulcers in cats, including:

An indolent ulcer, also known as a rodent ulcer or eosinophilic granuloma complex, is a type of chronic ulceration that can occur in cats. It is usually located on the upper lip or in the mouth and can be quite painful and uncomfortable for the cat. They are typically raised, red, and have a white or yellow center. Indolent ulcers typically appear as raised, pink or red lesions with a smooth surface. They may be slow to heal and can recur after treatment. Other symptoms may include drooling, reluctance to eat or drink, and general discomfort.

Oral plaque: This is a type of bacterial infection that can lead to the formation of ulcers in the mouth. Oral plaque can cause bad breath and redness and inflammation in the mouth.

Calicivirus ulcers: Calicivirus is a common virus that can cause upper respiratory infections in cats. In some cases, it can also cause mouth ulcers.

Feline herpesvirus ulcers: Feline herpesvirus is another common virus that can cause upper respiratory infections in cats. In some cases, it can also cause mouth ulcers.

Ulcerative stomatitis: This is a severe form of mouth ulcer that affects the entire mouth and can cause pain and difficulty eating. It is usually associated with an underlying immune system disorder.

Symptoms of Mouth Ulcers in Cats

  • Drooling
  • Bad breath
  • Refusal to eat or drink
  • Pawing at the mouth or face
  • Swelling or redness in the mouth or on the lips
  • Bleeding or discharge from the mouth
  • Chewing on one side of the mouth
  • Vocalizing while eating or drinking
  • Weight loss or lack of appetite
  • Lethargy or decreased activity levels

Causes of Mouth Ulcers in Cats

Mouth ulcers in cats can have several different causes. Some of the most common causes include:

  • Infections: Feline calicivirus, herpesvirus, and other types of bacterial or viral infections can cause mouth ulcers in cats.
  • Trauma: Cats can develop mouth ulcers from injuries such as burns, cuts, or bites to the mouth or tongue.
  • Allergies: Cats may develop mouth ulcers as a result of allergic reactions to food, medications, or other substances.
  • Immune system disorders: Some immune system disorders, such as feline autoimmune disease, can cause mouth ulcers in cats.
  • Dental disease: Dental issues such as gingivitis, periodontal disease, or tooth decay can lead to mouth ulcers in cats.
  • Cancer: Oral tumors or other types of cancer can cause mouth ulcers in cats.
  • Systemic diseases: Systemic illnesses such as kidney disease, liver disease, or diabetes can cause mouth ulcers in cats.

How Does Kidney Disease Affect the Mouth?

Kidney disease can affect the development of mouth ulcers in several ways. One of the primary ways is through the buildup of uremic toxins in the blood. When the kidneys are not functioning properly, they are not able to effectively filter waste products and toxins from the blood. As a result, these waste products can build up in the body, including in the mouth, and contribute to the development of ulcers.

Uremic toxins can also cause inflammation in the body, including in the oral mucosa (the lining of the mouth). This can make the mouth more susceptible to infections and can contribute to the development of ulcers.

Additionally, people with kidney disease may experience dry mouth, which can increase the risk of ulcers. Dry mouth can occur because the kidneys are not able to regulate the balance of fluids and electrolytes in the body, which can lead to a decrease in the production of saliva. Saliva helps to protect the mouth against bacteria and helps to keep the oral mucosa moist. When there is a decrease in saliva production, the mouth can become dry and more susceptible to ulcers.

Treatment of Mouth Ulcers in Cats

Stomatitis in Cats Home Remedies

The treatment of mouth ulcers in cats will depend on the underlying cause of the ulcers. In some cases, no specific treatment may be necessary as the ulcers may heal on their own. However, if the ulcers are causing your cat significant discomfort or if they are not healing on their own, your veterinarian may recommend one or more of the following treatments:

  • Pain management: Your veterinarian may prescribe pain medication to help manage your cat's discomfort.
Puainta® Spray for Mouth Ulcer and Mouth Cleaning


  • Helps repair oral mucosa
  • Helps heal mouth wounds
  • Relieves pain, redness and swelling
  • Can be licked; safe and not irritating

How to use

Spray the affected area once or twice a day; press 3-5 times at a time, for 3-5 days.


Chitosan quaternary ammonium salt, trehalose, cymene, glycerol, plant extrac.

  • Antibiotics: If the ulcers are caused by a bacterial infection, your veterinarian may prescribe antibiotics to help clear the infection.

Puainta® Metronidazole Tablets to Treat Stomatitis, Mouth Ulcer, Gingivitis, Periodontitis, Halitosis








  • Maintaining good oral hygiene by brushing and providing gum or toothpowder can help prevent ulcers and other dental problems from forming.

Teeth Cleaning Powder, 30g







  • Anti-inflammatory medication: Anti-inflammatory drugs such as corticosteroids may be prescribed to help reduce inflammation and promote healing.
  • Dental cleaning: If the ulcers are caused by dental disease, your veterinarian may recommend a dental cleaning to remove any tartar or plaque buildup.
  • Diet modification: If the ulcers are caused by an underlying dietary issue, your veterinarian may recommend a change in your cat's diet.
  • Immunosuppressive therapy: If the ulcers are caused by an autoimmune disorder, your veterinarian may recommend immunosuppressive therapy to help manage the condition.

What to Feed a Cat with a Sore Mouth

  1. Scrambled eggs: Make some scrambled eggs and feed them to your cat for a soft and tasty meal. Eggs are a fantastic source of protein and are easy to digest.
  2. Boiled chicken: Boiled chicken is a classic option for cats with mouth sores. It is relatively softer than other foods, easy to chew, and high in protein.
  3. Water: It's important to make sure your cat stays hydrated, especially if they're not eating or drinking as much as usual. Offer your cat fresh water frequently and consider adding water to their food to increase their hydration.
  4. Soft food: Soft, wet food is easier for cats with sore mouths to eat than dry food. You can offer your cat canned or pouch food that is high in protein and low in carbohydrates.
  5. Pureed pumpkin: Pumpkin contains a lot of fiber. It can help your cats’ digestive system and allow them to eat more easily without putting too much pressure on their mouth. Just be sure to use plain canned pumpkin puree rather than pumpkin pie filling.


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