Symptom Analysis

Stomatitis Symptom Guide for Pets | Observation Points and When to Seek Care

Understand possible causes of Stomatitis and home observation points

Oral inflammation can cause pain and eating changes. Observe closely and record timing and frequency for later evaluation.

Last updated: 2026/08/16
Pet Health Map Editorial Team
Sources: WSAVA, AVMA

What this symptom means clinically

Stomatitis is inflammation of the oral mucosa and adjacent tissues, triggered by infection, immune reactions, periodontal disease, trauma, or other factors. It can cause mucosal swelling, ulcers, or bleeding and affect chewing and salivation.

🐱 In cats

Feline stomatitis is often chronic and widespread, involving oral and gingival inflammation related to immune reactions or oral pathogens.

🐶 In dogs

Canine stomatitis is more often related to periodontal disease, tartar, or local irritation, and may be localized or spread to nearby tissues.

Clinical signs you can observe

Check whether your pet shows any of the signs below. If several apply, seek veterinary care promptly.

Record the date, time, and context when stomatitis was first noticed.
Measure or estimate the affected area or vital value when applicable, and write down the exact value and unit.
Take clear photos or short videos from the same angle and label the date and time.
Observe whether stomatitis is intermittent, persistent, improving, or worsening, and record duration.
Record related behavior changes such as appetite, activity, grooming, pain response, or avoidance of touch.
Compare left and right sides or resting and activity states when relevant, and record asymmetry or changes.

Possibly Related Conditions

Conditions owners commonly find associated with this symptom — tap to learn more.

Dentistry

Stomatitis and Oral Ulceration

Oral pathology causes pain, infection, or structural damage. This dental involvement manifests as stomatitis.

Nephrology

Azotemia and Uremia

Infectious agents cause tissue damage and trigger inflammatory responses. This pathological process manifests as stomatitis.

Dermatology

Dermatoses, Viral (Non-Papillomatosis)

Infectious agents cause tissue damage and trigger inflammatory responses. This pathological process manifests as stomatitis.

Internal Medicine

Ehrlichiosis and Anaplasmosis

Infectious agents cause tissue damage and trigger inflammatory responses. This pathological process manifests as stomatitis.

Internal Medicine

Feline (Upper) Respiratory Infections

Infectious agents cause tissue damage and trigger inflammatory responses. This pathological process manifests as stomatitis.

Internal Medicine

5-Fluorouracil (5-FU) Toxicosis

Toxic compounds disrupt normal cellular function through direct tissue damage. This pathological process manifests as stomatitis.

This page helps owners understand symptoms and recognise risk; it cannot replace an in-person veterinary examination, diagnosis or treatment. If your pet shows any symptoms, please consult a qualified veterinarian as soon as possible.

Frequently Asked Questions (FAQ)