6 causes of lip and mouth ulcers in cats

For several reasons, lip and mouth problems are common in both kittens and cats.

The canker sores in cats usually appear as sores in the mouth of cats that can be accompanied by bleeding and pain, especially if not cured.

If you see these ulcers on your cat or the symptoms, go to a veterinarian so that he can determine the underlying cause of these ulcers and thus begin a treatment for their solution.

Here are the possible reasons for these ulcers:

Causes of sores in the mouth of cats

In order of frequency, oral lesions in cats are caused by:

  • Feline eosinophilic granulomacomplex .
  • Feline calicivirus.
  • Renal insufficiency.
  • Gingivitis and Stomatitis in cats.
  • Squamous cell carcinoma.
  • Chemical injuries

Now I expose it in some more detail:

  1. Feline eosinophilic granuloma complex

CGD refers to a variety of skin conditions, all caused by a build-up of a white blood cell called an  eosinophil . It is a type of blood cell that the immune system sends to fight an infection or the presence of a foreign body, as a result inflammation occurs.

The problem is that they sometimes stay a long time and the persistent inflammation will cause a bulge that the cat will find annoying. These areas can develop into granulomas , which are sore-like lesions.

Corticosteroid treatment is usually simple, inexpensive, and effective. Some cats are associated with flea bites, so you should also use a good cat flea preventative even if you haven’t seen them.

  1. Feline calicivirus

The calicivirus is a viral infection common in cats that causes flu cat , causing respiratory symptoms such as sneezing, runny nose, rhinitis and Sores .

Cats become infected either directly, through direct contact with the secretions of an infected cat, or indirectly through objects such as bowls and bedding.

Common disease in places such as feline kennels, shelters and colonies of stray cats, although house cats can also contract it.

Regarding treatment, it  can include antibiotics to treat secondary bacterial infections and fluids to prevent dehydration; as well as removal of nasal and ocular discharge with a warm and damp cloth.

  1. Gingivitis and stomatitis in cats

Without good dental care, all cats tend to get gingivitis . However, in some unfortunate people, the inflammation of the mouth and the infection appear more quickly. Causes can be viral infections such as calicivirus , FIV and FeLV, genetic flaws, and poor nutrition.

Gingivitis in cats often causes  stomatitis,   as inflammation and ulceration separate from the gum margin. These cats can continue to eat, but are generally in severe pain.

The gingivitis-stomatitis occurs around the gums in most cases and some also in the tissues of the tongue. Signs include bad breath, reluctance to eat hard foods, drooling, pain when opening the mouth, and bleeding gums.

Although they improve with good dental hygiene, stomatitis in cats is best cured with tooth extraction. It is an extreme step, but all too often it is necessary to treat ongoing pain.


  1. Feline renal failure

Strange white sores will appear on the gums associated with the uremic syndrome of advanced kidney  disease in the cat. This is due to the high levels of toxins in the blood that are normally excreted by the kidneys.

Unfortunately, uremia is a serious, late sign generally associated with a poor response to treatment.

  1. Squamous cell carcinoma

This is especially true for squamous cell carcinoma,  which can show up as a slow-spreading lump, ulcer, or sore.

It is known to affect the nose and ears of cats that bask in the sun. However, it can also be found inside the mouth, sometimes hidden by dental disease.

Cryosurgery is the usual treatment for these lesions that are not in an advanced stage.

  1. Injury from contact with chemical product

The animals they raise are especially sensitive to their environment. When a cat is exposed to toxic chemicals on its fur or paws, its first response is to lick them. The most serious cases of oral ulceration are the result of exposure to household cleaning fluids.

Many products that we have around the house such as cleaners and bleach are irritants and curiosity can lead cats to swallow them, causing irritation of the mouth and throat that can be very severe in some cases.

Prevention is the best, never let the cats are near the areas that are being cleaned or disinfected, and all these products should be kept out of the reach of your cat.



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