Gingival Enlargement - Advanced Animal Dentistry

Gingival Enlargement (hyperplasia), also known as gum overgrowth, is a common dental condition in dogs where the gingiva (gum tissue) becomes excessively thickened, enlarged or swollen. This can lead to a variety of dental issues, including discomfort, difficulty eating and an increased risk of dental infections. Understanding the symptoms, causes and treatment options is crucial to keeping your dog’s oral health in check.

What is Gingival Enlargement?

Gingival enlargement refers to the abnormal overgrowth of the gum tissue around the teeth.

This excessive tissue can partially or completely cover the teeth, creating pockets where food and bacteria can accumulate, leading to bad breath, infections and even periodontal disease.

While this condition is generally not painful in its early stages, it can become uncomfortable as the tissue continues to grow, making it difficult for your dog to chew and maintain good oral hygiene.

“Gingival enlargement isn’t just cosmetic — excess gum tissue can hide disease and make dental problems harder to control.”

Causes of Gingival Enlargement

Genetics: Certain breeds, including Boxers, Bulldogs and Collies, are genetically predisposed and more likely to experience gingival enlargement.
Medication Side Effects: Some medications, such as anti-seizure drugs (like phenytoin), calcium channel blockers and immunosuppressants, can cause gum tissue to grow excessively.
Poor Oral Hygiene: Accumulation of plaque and tartar due to inadequate dental care can irritate the gums, leading to inflammation and overgrowth.
Inflammation and Infection: Chronic inflammation from periodontal disease or other dental conditions can stimulate abnormal gum growth.

Symptoms of Gingival Enlargement

If your pet is suffering from gingival enlargement, you may notice certain symptoms such as:

Enlarged Gums: The most noticeable symptom is the thickening and overgrowth of the gums, often covering the teeth partially or entirely.
Bad Breath: Overgrown gums can trap food particles, leading to bacterial growth and foul-smelling breath.
Bleeding Gums: The swollen gums may bleed easily, especially when touched or during brushing.

Diagnosis

We can diagnose gingival enlargement through a thorough oral examination. In some cases, dental X-rays may be necessary to assess the extent of the overgrowth and any underlying dental issues.

“Treating gum overgrowth early helps prevent deeper periodontal damage and keeps daily dental care manageable.”

Treatment

Treatment options include:

Surgical Removal: Gingivectomy, a surgical procedure to remove the excess gum tissue, is the most common treatment. It helps restore normal gum lines and prevents further complications.
Regular Dental Care: Keeping your dog’s teeth clean through regular brushing and professional dental cleanings can help prevent the recurrence of gingival enlargement.
Medication Adjustment: If the condition is medication-induced, your vet may adjust the dosage or prescribe alternative drugs.
Add in biopsy: a biopsy of the abnormal tissue may be recommended on a case by case basis.

Prevention & Care

Preventing gingival enlargement involves maintaining good oral hygiene practices, such as regular brushing, dental check-ups and providing dental chews or toys to help clean your dog’s teeth. If your dog is on medication that could cause gum overgrowth, consult your veterinarian about any potential side effects.

Meet the Author

Bec Tucker

Specialist Veterinary Dentist – BVSc (Hons) MANZCVS (Small Animal Dentistry and Oral Surgery) 
Diplomate, American Veterinary Dental College™

Hi, I’m Dr Bec Tucker, and my journey into veterinary dentistry has been unexpected yet incredibly fulfilling. In fact, dentistry wasn’t on my radar at all when I graduated with a BVSc (Hons) from the University of Sydney in 2007. I was fortunate to meet veterinarians who had found their passion for dentistry, and their encouragement and enthusiasm shifted my perspective. Through continuing education lectures and workshops, I went from not fancying dentistry and oral surgery to genuinely loving it.

FAQs

What exactly is gingival enlargement in my dog’s mouth, and why should I care?

Gingival enlargement—also called gum overgrowth—is when the gum tissue becomes abnormally thick, swollen or enlarged around the teeth. This can create pockets that trap food and bacteria, increasing the risk of infection, bad breath and periodontal disease if not addressed.

How can I tell if my pet’s gums are just inflamed or truly growing too much tissue?

Inflamed gums (gingivitis) generally look red and may bleed, while gingival enlargement makes the gum tissue thicker and bulky around the teeth, sometimes partially covering them. A vet or dental specialist usually examines under anaesthesia and uses dental X-rays to assess the extent and rule out oral masses.

What causes gum overgrowth in pets — is it bad dental hygiene or something else?

Gingival enlargement can stem from gum irritation and plaque buildup, but it may also be influenced by genetics or medications that trigger excessive gum growth. Although it’s more common in certain dog breeds, any pet with ongoing gum inflammation can be affected.

Is gingival enlargement just cosmetic, or can it lead to more serious problems for my pet?

It starts as an abnormal tissue overgrowth, but if left untreated, the excess gum can trap debris and bacteria, leading to deeper periodontal disease, bad breath and discomfort while eating. Addressing it early helps protect your pet’s long-term oral health

What treatment options are available if my vet says my pet has gingival enlargement?

Treatment begins with thorough dental cleaning and plaque control. If overgrown tissue remains a problem, procedures like gingivectomy (gently removing excess gum tissue) may be recommended to restore normal contours and make cleaning easier.

Key Takeaways

Gingival enlargement is more than just “big gums”

Excess gum tissue can trap food and bacteria, making dental disease harder to control and increasing the risk of infection and discomfort.

It’s often linked to inflammation, genetics, or medication—not just hygiene

Even well-cared-for pets can develop gum overgrowth, particularly certain breeds or those with chronic gum irritation.

Left untreated, gum overgrowth can worsen periodontal disease

Overgrown tissue creates pockets around teeth that accelerate plaque buildup and bone loss if not addressed early.

Early treatment improves comfort and makes ongoing care easier

Professional dental cleaning and, in some cases, removal of excess gum tissue can restore healthier gum contours and support long-term oral health.

Next steps

For Pet Owners

Are you concerned about your pet’s dental health? Call 1300 866 848 or fill out the contact form. We’ll coordinate with your primary vet to ensure the best outcome.

For Vets & Nurses

We’re here to help. If you’d like to refer a patient, please call us at 1300 866 848 , complete the referral form or email us with a brief case summary, relevant radiographs and lab results.

For advice and treatment guidance, email us with a brief case summary, relevant radiographs and lab results.

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