What is the most common health problem in cats?

Periodontal (gum) disease. In a large UK study of cats in everyday practice, it was the single most commonly diagnosed disorder, found in about 15 percent of cats in a year, and broader dental disease affects an estimated 50 to 90 percent of cats over the age of four.

What are the signs of gum disease in cats?

Often very few until it is advanced. Watch for bad breath, drooling, difficulty eating or dropping food, turning the head while chewing, a preference for soft food, and pawing at the mouth. Many cats hide the discomfort, which is why the disease is so often caught late.

Why does my cat need anesthesia for a dental?

Because most of the disease is below the gumline, where it cannot be seen or treated on an awake cat. A proper assessment needs probing of the gums and full-mouth dental X-rays, plus cleaning and any extractions, all of which require anesthesia. Anesthesia-free dentistry only cleans the visible surface and misses what matters.

How do I prevent gum disease in my cat?

Daily toothbrushing with cat-specific toothpaste is the most effective prevention, because it removes plaque before it hardens. Products carrying the Veterinary Oral Health Council (VOHC) seal are independently shown to help control plaque and tartar. Regular professional cleanings handle what home care cannot reach.

Is gum disease the same as tooth resorption in cats?

No, they are different diseases. Tooth resorption, where the body dissolves the tooth, has an unknown cause and cannot reliably be prevented. Periodontal disease is driven by plaque and the body's response to it, and it is largely preventable with good dental care.

Gum Disease in Cats: The Most Common Diagnosis There Is, and How to Prevent It

Here is the short version: the most common thing a cat will ever be diagnosed with is gum disease. It builds quietly behind bad breath and a mouth that looks fine from the outside, and by the time a cat shows obvious trouble, teeth and the bone around them are already being lost. The encouraging part, and the reason this article exists alongside our piece on tooth resorption, is that gum disease, unlike resorption, is genuinely preventable. This guide explains how it develops, why you cannot judge it by looking, and what actually keeps it away.

The most common feline diagnosis there is

This is not a minor footnote in cat health. A large UK study of cats in everyday veterinary practice found periodontal disease to be the single most commonly diagnosed disorder, recorded in about 15 percent of cats over a single year.¹ Look wider at dental disease as a whole and Cornell estimates that 50 to 90 percent of cats over the age of four are affected to some degree.² If your cat is an adult, its mouth deserves attention as a default, not as an afterthought.

periodontal disease is the most commonly diagnosed disorder in cats, recorded in about 15% in a single year

O'Neill et al., VetCompass, 2023

How plaque becomes bone loss

Gum disease runs along a predictable path. It starts with plaque, a sticky film of bacteria that forms on the teeth. Plaque irritates the gums and causes gingivitis, inflammation that is still reversible at this stage.² If the plaque is not removed, the inflammation digs deeper and destroys the tissue and bone that anchor the tooth, which is periodontitis, and that damage does not come back.³ A detail worth knowing: much of the destruction is driven by the cat's own immune response to the bacteria, not the bacteria alone, which is part of why it can progress quietly.

Why you cannot judge it by looking

Cats are stoic about mouth pain, so the early and middle stages often show almost nothing. When signs do appear, they include bad breath, drooling, difficulty eating or dropping food, turning the head to chew on one side, a new preference for soft food, and pawing at the mouth.³ The trouble is that those tend to show up only once disease is advanced, which is why so many cats are diagnosed late.

This is also why a real dental assessment requires anesthesia. The disease that matters is largely below the gumline, and evaluating it means probing the gums and taking full-mouth dental X-rays, neither of which can be done on an awake cat.² The 2025 feline dental guidelines make the same point and specifically caution against anesthesia-free "cleanings," which only polish the visible surface and leave the real problem untouched.⁴

What treatment looks like

A professional dental under anesthesia includes a full-mouth exam and X-rays, scaling to remove plaque and tartar above and below the gumline, polishing, and extraction of any teeth too damaged to save.² Owners often dread extractions, but cats are remarkably comfortable afterward, and removing a painful, diseased tooth usually leaves a cat eating and feeling better, not worse.

What it costs

A feline dental cleaning under anesthesia, including bloodwork and X-rays, commonly runs about $300 to $800, and rises to roughly $500 to $1,500 or more once extractions are involved. These are US market estimates that vary by region and by how much disease is found. As with our dog dental guide, the bill is smallest when the problem is caught early, which is the whole case for prevention.

The part you can actually prevent

Here is where gum disease parts ways with tooth resorption. Because periodontal disease is driven by plaque, removing plaque prevents it, and the most effective tool is daily toothbrushing with a cat-specific toothpaste.² Never use human toothpaste, which contains ingredients unsafe for cats. Plenty of cats tolerate brushing surprisingly well if it is introduced slowly and paired with patience.

For everything beyond brushing, the shortcut to knowing what works is the VOHC Seal of Acceptance. The Veterinary Oral Health Council reviews trial data and awards its seal only to dental diets, treats, gels, and water additives shown to reduce plaque or tartar.⁵ If a product carries that seal, there is evidence behind it. If it does not, the claim is just marketing. None of this replaces periodic professional cleanings, which reach what home care cannot.

What to do this week

Lift your cat's lip and look at the gumline along the back teeth: redness, a brown crust, or a strong odor are reasons to book a dental exam.
Start toothbrushing slowly with cat toothpaste, beginning with just letting your cat taste it and building up over days.
Swap any unproven dental treats for VOHC-accepted ones, sized for a cat.
Ask your vet when your cat is due for an anesthetized dental with X-rays, and decline awake "cleanings" that skip them.

Gum disease is the most common diagnosis in cats for a simple reason: plaque forms every day, and most cats never get their teeth brushed. That also makes it one of the most preventable serious problems your cat will face. A few minutes of care most days, the right products, and a proper dental when it is due will spare your cat a great deal of hidden pain, and spare you the bigger bill that comes with catching it late.