What Is Gingival Hyperplasia?
Gingival hyperplasia is a non-cancerous overgrowth of gum tissue. The gums thicken and spread over the surfaces of the teeth, sometimes until the crowns are partly hidden. It is common in dogs, especially as they age, and rare in cats.
The overgrown tissue itself is benign, but it creates deep pockets between gum and tooth where plaque, food and bacteria collect. Left alone, those pockets speed up periodontal disease and tooth loss.
Why it matters
Gum overgrowth can look identical to an oral tumor. Your vet may recommend a biopsy of the removed tissue to rule out an epulis or cancer, especially if only one area is affected.
Causes and Risk Factors
- Breed: Boxers, Bulldogs, Great Danes, Collies, Dobermans and Dalmatians are prone to a hereditary form. Many Boxers develop it by middle age.
- Plaque and inflammation: chronic gum inflammation from poor oral hygiene encourages overgrowth.
- Medications: cyclosporine (used for allergies and immune disease), amlodipine (for blood pressure) and some anti-seizure drugs such as phenytoin can trigger it.
- Age: it becomes more common in middle-aged and senior dogs.
Signs Owners Notice
- Thick, lumpy or rolled gums along several teeth
- Gums covering part of the tooth surface
- Bad breath and food trapped along the gumline
- Bleeding gums, or gums that get bitten while chewing in severe cases
Diagnosis
Diagnosis happens during a dental exam under anesthesia. Your vet probes the gum pockets, takes dental X-rays to check the tooth roots and bone, and often sends the removed tissue for a biopsy to confirm it is hyperplasia rather than a tumor. Your vet will also review any medications that could be contributing.
Treatment and Outlook
- Gingivectomy: the extra tissue is trimmed back with a scalpel, laser or electrosurgery to restore a normal gumline, combined with a professional cleaning.
- Medication review: if a drug is the trigger, your vet may lower the dose or switch medications. Gum overgrowth often improves once the drug is changed.
- Extractions: badly diseased teeth trapped under the overgrowth may need to be removed.
The outlook is good. Hereditary hyperplasia can regrow, so prone breeds may need repeat trimming every year or two alongside regular cleanings.
Practical Tips for US Pet Owners
- Brush daily to limit plaque; see dog dental care for technique.
- Check the gums monthly if your dog takes cyclosporine or amlodipine, or is a prone breed.
- Ask for a written estimate that includes X-rays and biopsy before the procedure.
- Find a practice that offers dental surgery through veterinary clinic listings.
When to see a vet
Book a dental check if your dog’s gums are growing over the teeth, bleeding, or if one lump is growing faster than the rest. See dog dental disease for other mouth problems to rule out.
Key Takeaways
- Gingival hyperplasia is a benign overgrowth of the gums.
- Breed, plaque and certain drugs are the main causes.
- Trimming plus good home dental care keeps most dogs comfortable.
FAQ
Is gingival hyperplasia painful?
Usually not on its own, but the infection and pockets it causes can be. Some dogs bite the overgrown tissue when chewing.
What is the difference between gingival hyperplasia and an epulis?
Hyperplasia is a general thickening of normal gum tissue, often along many teeth. An epulis is a true tumor that usually forms a single lump. A biopsy tells them apart.
Can cats get gingival hyperplasia?
It is rare in cats. Overgrown or swollen gums in cats are more often linked to dental disease or stomatitis.