Gingival Hyperplasia: When Your Pet’s Gums Start to Overgrow
Bulky, bumpy gum tissue can crowd the teeth and trap food where a toothbrush cannot reach. Gingival hyperplasia is an overgrowth of gum tissue—but not every lump or thickened area is simply extra gum. An accurate diagnosis matters.
If you have noticed a new, growing, bleeding, or painful mouth mass, contact your veterinarian for an examination.
Clinical example of gingival hyperplasia in a dog. Image source.
New or changing tissue should be examined. Schedule veterinary care if the gums are growing over teeth, bleeding, painful, or making it harder for your pet to eat.
Call DVDP: (302) 463-2879Gum tissue grows beyond its usual boundary
Gingival hyperplasia—also called gingival enlargement—describes gum tissue that has become thickened or overgrown. It may appear as smooth swelling or as firm, lobulated folds that partially cover the teeth.
Enlarged tissue can create deep pockets around teeth. Food and plaque may collect in those spaces, making the area harder to keep clean and potentially contributing to inflammation and periodontal problems.
Appearance alone cannot confirm the cause. Some oral growths can resemble gingival hyperplasia. Your veterinarian may recommend additional testing, including a biopsy, to identify what the tissue is.
Simplified educational illustration. A real diagnosis may require an oral examination and testing of the tissue.
Look for changes around the gumline
Gingival enlargement can develop gradually. You may notice the tissue before your pet shows an obvious change in behavior.
Thick or bulky gums
Gum tissue may look raised, rounded, or uneven around one or more teeth.
Gums covering part of a tooth
Overgrowth may extend over the visible tooth surface or create folds.
Food collecting near the gums
Deepened spaces can trap debris that is difficult to remove at home.
Redness, bleeding, or bad breath
Inflammation or periodontal disease may be present at the same time.
Difficulty chewing
Your pet may drop food, chew differently, or avoid harder foods.
A distinct lump or changing area
A focal growth needs evaluation because several conditions can look similar.
There may be more than one cause
Your veterinarian will consider the appearance and location of the tissue, your pet’s health history, and any medications they take.
Plaque and inflammation
Irritation from plaque and periodontal inflammation can be associated with enlarged gum tissue.
Medication effects
Certain medications have been associated with gingival enlargement in some animals. Do not stop or change a medication without speaking with the prescribing veterinarian.
Individual or breed tendency
Some dogs appear more predisposed to gingival overgrowth. Your veterinarian can consider breed and family history as part of the assessment.
Other oral growths
Tumors and other lesions can resemble gum overgrowth. A veterinarian may recommend a biopsy when the diagnosis is uncertain.
More than one issue
Gingival enlargement can occur alongside periodontal disease or other dental conditions, so the full mouth needs assessment.
First identify what the tissue actually is
The appearance of enlarged gums can guide the examination, but a veterinary professional must determine whether the tissue represents hyperplasia, inflammation, or another type of growth.
Review and oral exam
The veterinary team reviews the timeline, medications, medical history, and the appearance of the gums and teeth.
Assess teeth and support
A complete dental assessment may include periodontal measurements and dental X-rays to evaluate areas beneath the gumline.
Test tissue if needed
If a growth cannot be confidently identified by its appearance, the veterinarian may recommend biopsy and laboratory analysis.
Care may involve more than removing extra tissue
Treatment depends on the diagnosis, how much the gum tissue interferes with the teeth, and whether inflammation or periodontal disease is also present. In selected cases, a veterinarian may recommend reshaping or removing excess tissue. Follow-up matters because enlargement can return.
- Address plaque, inflammation, or periodontal disease if present.
- Review medication history with the prescribing veterinarian.
- Consider tissue sampling when the diagnosis is uncertain.
- Plan rechecks and home care with your veterinary team.
Do not adjust medication on your own
If you suspect a medication may be contributing, contact the veterinarian who prescribed it. Stopping a medication abruptly may put your pet’s health at risk.
Ask your veterinary team when brushing or other home dental care is safe, particularly if your pet’s gums are sore or bleeding.
Have you noticed overgrown or changing gum tissue?
Delaware Veterinary Dental Practice provides dental care for dogs and cats and works with referring veterinarians on oral health cases. If your pet has enlarged gums, a growth near the teeth, or difficulty chewing, request an appointment to discuss an evaluation.
For veterinarians
Need input on a patient with gingival enlargement, periodontal complications, or an undiagnosed oral growth? Contact DVDP to discuss referral and coordinated care with the veterinary dental team.
Veterinary referral informationGingival hyperplasia FAQs
What is gingival hyperplasia in dogs and cats?
Gingival hyperplasia, also called gingival enlargement, is an overgrowth or thickening of gum tissue. It may partially cover teeth or create deeper spaces around them.
Is gingival hyperplasia cancer?
Not necessarily. Several conditions can look like gum overgrowth, including some tumors. A veterinary exam—and sometimes a biopsy—is needed to identify the tissue.
Can medication cause gum overgrowth?
Some medications have been associated with gingival enlargement in animals. Tell your veterinarian about all medications your pet takes, and do not stop or change a prescription without veterinary advice.
Does gingival hyperplasia need treatment?
Treatment depends on the cause and whether the tissue affects comfort, cleaning, or the teeth. Your veterinarian can recommend an appropriate plan after examining your pet.
Can the gum tissue grow back after treatment?
Recurrence is possible in some cases. Follow-up examinations and ongoing dental care may be part of the treatment plan.
When should I contact a veterinarian?
Contact your veterinarian if gum tissue is growing, bleeding, changing, covering teeth, or affecting eating. Seek prompt care for significant pain, facial swelling, bleeding, or difficulty eating.