Gingivitis is the most common type of oral disease among cats. It's as prevalent among cats as it is in dogs or humans. However, cat gingivitis may involve more than the simple swelling and bleeding of the gums you might experience in your own mouth. Indeed, in some cases, it can be life-threatening.

Because it's so common — as well as potentially complex and severe — it's important for cat parents to understand the causes and signs of feline gingivitis, as well as basic treatment and prevention measures.

What Is Gingivitis?

Gingivitis is a swelling of the gums. It mostly occurs in senior cats, when plaque builds up and the gums respond with swelling, redness, bleeding and sensitivity. Plaque is an accumulation of bacteria combined with substances that turn the mix into a concretion that adheres to the teeth. Plaque leads to swelling of both the gums and the periodontal ligament — the structure that attaches teeth to the underlying bone.

When the periodontal ligament reacts to plaque with swelling and deterioration, the resulting disorder is referred to as periodontitis, or periodontal disease. When the gums react, the result is gingivitis. These diseases are often incorrectly used interchangeably, so it's important to distinguish them from one another.

Causes of Gingivitis in Cats

In most cats, gingivitis is the result of gradual plaque accumulation, a process that occurs as cats age. There's tremendous variation in the degree to which cats' gums react to plaque. Some cats seem to accumulate large amounts of plaque with a minimum of gingivitis while other cats' gums react more severely.

A cat's unique degree of gingivitis largely has to do with genetics, but gingivitis in cats can also be affected by certain conditions, including:

• Infectious diseases: Feline leukemia virus and feline immunodeficiency virus are the most common infectious diseases that can lead to gingivitis.
• Tooth resorption: The cavity-like lesions that characterize this condition can cause gingivitis around the affected teeth.
• Juvenile-onset gingivitis: Teething cats typically experience mild gingivitis, but severe gingivitis can also occur after adult teeth come in.
• Fractured teeth: Traumatic conditions can trigger gingivitis.
• Malocclusions: Misaligned teeth and other orthodontic abnormalities may lead to gingivitis.
• Eosinophilic granuloma complex: This inflammatory disease can sometimes affect the lips, gums, tongue and, consequently, nearby teeth.
• Gingival hyperplasia: While less common in cats than dogs, gum overgrowth leads to gingivitis in both animals.
• Gingivostomatitis: This disease is the result of an extreme overreaction of the gums and surrounding oral tissues to dental tissues and plaque, and can cause a debilitating amount of pain. Cats with the condition may be unable to eat or drink. Cats with stomatitis, a chronic form gingivitis with inflammation in your cat's mouth can be severe enough to require a full mouth extraction.

Signs of Feline Gingivitis

The primary signs of feline gingivitis include redness and bleeding at the gumline. More severely affected cats will have oral pain. You'll be able to tell whether your cat is in pain if they do any of the following:

• Drool
• Show an unwillingness to eat and/or drink
• Sit in front of the food or water bowl
• Eat messily or eat with one side of the mouth
• Cry or yowl when eating
• Lose weight

Some severely affected cats will display only very subtle signs of pain. Make frequent health checks and dental cleanings to ensure your cat's mouth and teeth get thoroughly examined on a regular basis.