How does gingival hyperplasia develop?

Gingival hyperplasia can be linked to chronic inflammation, periodontal disease, drug reactions, or genetics. A veterinary examination and appropriate tests are needed to confirm the cause. It is advisable to consult your vet to identify the underlying reason.

Does gingival hyperplasia require a biopsy?

If the gum tissue grows abnormally or rapidly, your vet may recommend a biopsy to rule out tumours or unusual pathological changes. The decision is ultimately based on the vet's clinical assessment.

What oral care can be done at home?

Based on your vet's advice, establish a regular brushing or oral hygiene routine, use appropriate dental care products, and schedule regular check-ups to monitor periodontal health.

How much does treatment cost approximately?

Treatment costs depend on the diagnostic tests required and whether surgery is needed — simpler cases tend to cost less, while complex surgery and biopsy fees vary by clinic. Ask your vet for a detailed quote.

How much do the tests and treatment for this condition usually cost?

Costs vary by clinic and region — ask your vet for an estimate before proceeding.

Disease Guide

Gingival Hyperplasia in Dogs & Cats: Oral Symptoms, Dental Exam & Care Guide [2025]

Gingival hyperplasia can be benign overgrowth or medication-induced. It may affect eating and dental health. If caused by medication, it may improve after discontinuation; severe cases may require surgical removal.

Take 1 minute to check the symptoms first

Last updated: 2026/01/05

Pethealthmap Editorial Team

Sources: WSAVA, AAHA, AVMA

When to See a Vet

Seek immediate veterinary care (emergency)

•Heavy oral bleeding that will not stop, accompanied by breathing difficulty
•Gums turning markedly purple or pale and worsening within a short time
•Inability to eat or swallow, with obvious dehydration or weakness

Schedule a veterinary visit soon (within 24–72 hours)

•Persistent bad breath or mouth odor lasting several days without improvement
•Slower eating or food refusal with a significant daily drop in food intake
•A persistent mass in the mouth or thickened gums that do not subside

01What Symptoms Indicate a Problem?

Gingival hyperplasia commonly causes oral discomfort that affects eating and daily behaviour.

Persistent, noticeable bad breath or oral odour that is difficult to resolve
Slower eating, changes in chewing pattern, or difficulty eating dry kibble
Increased gum bleeding or drooling, especially when chewing
Avoidance of hard objects, reluctance to chew, or signs of pain when biting
Weight loss, reduced energy or activity levels, or decreased appetite
Visibly thickened, red, swollen gums or a localised mass forming in the mouth

Seek emergency care immediately if you notice the following symptoms:

⚠️ Gums appearing purple or abnormally pale, suggesting poor blood flow or lack of oxygen
⚠️ Heavy bleeding from the mouth or continuous bleeding that cannot be controlled

02How to Assess the Situation at Home: Observation Tips and When to Seek Emergency Care

Observing and recording changes in your pet's oral health, eating habits, and behaviour at home helps the vet assess the condition quickly.

Record the onset date and track whether symptoms are appearing, worsening, or improving
Take close-up photos and videos of the mouth and chewing behaviour, including the eating process
Log daily food intake, water consumption, and any signs of picky eating or food refusal
Note whether your pet frequently drools, holds food in its mouth, or chews abnormally
Photograph and monitor changes in gum colour, lump size, and location
If symptoms persist or worsen, schedule a veterinary appointment as soon as possible

03How Will the Vet Make a Diagnosis? Common Diagnostic Tests

At the clinic, the vet will perform a thorough oral examination and arrange imaging and tests as needed.

Full oral physical examination, including periodontal assessment and gum evaluation

Dental X-rays to assess involvement of tooth roots and alveolar bone

Gingival tissue biopsy if necessary, to rule out tumour or pathological changes

Blood and biochemistry tests to evaluate overall health and anaesthetic risk

Pre-operative urinalysis and other required pre-anaesthetic assessments

Recommend visiting a facility that can provide dental X-rays and biopsy services

04How to Treat and Care for Your Pet After Diagnosis: Medication, Diet Adjustments, and Care Guide

Treatment may involve medication and surgery; regular follow-up and home care are essential after treatment.

Use medication to control inflammation or concurrent infection as directed by your vet
Gingivectomy or periodontal surgery may be performed if necessary to restore oral space
Follow-up appointments after surgery to check wound healing and overall oral condition
Establish a home oral hygiene routine and adjust diet to reduce the risk of recurrence
Long-term monitoring after surgery is especially important for pets with periodontal disease or chronic conditions

05What to Prepare Before Seeing the Vet: Key Information to Help the Vet Identify the Cause Quickly

Bring a written or digital record of the onset date and progression of symptoms

Prepare a log of daily food intake, water consumption, and bowel or bladder habits

Bring close-up photos and videos of the mouth, chewing, or eating behaviour to aid explanation

List all current medications, supplements, and relevant medical history

Call the clinic in advance to confirm whether dental X-rays and biopsy services are available on-site

This content is for reference only and cannot replace a professional veterinary diagnosis. If your pet shows signs of illness, please seek veterinary care promptly.

Related Symptoms (You May Also Be Looking For)

Mass

Abnormal growth

Periodontal Disease

Tooth support disease

Tumor

Neoplasm

Lethargy

Decreased activity

Anorexia

Loss of appetite