What should you know about feline mouth cancer?

A mouth tumour can appear on the gums, tongue, palate, cheek lining or jaw. Possible presentations include a sore that does not settle, bleeding, bad breath, drooling, difficulty chewing, dropping food, facial swelling, loose teeth or weight loss. These features are not specific to cancer; dental disease, infection and injury may cause similar problems.

The veterinarian may examine the mouth, lymph nodes and general health, sometimes using sedation so the tissues can be seen safely. A biopsy can identify the tumour type. Imaging may help show how deeply it extends and whether nearby structures are involved.

Book a veterinary visit for a persistent oral sore, new swelling, bleeding or a change in eating. Offer soft, appealing food if chewing is uncomfortable, keep fresh water available and avoid scraping the lesion or giving human pain medicine. Record eating, drinking, drooling and behaviour so the clinician can judge comfort.

Treatment is tailored to the tumour’s site, extent and the cat’s condition. Tumour removal surgery may be considered, sometimes with neck dissection when lymph nodes need assessment or treatment. Radiotherapy may be discussed when local control is the goal. Your veterinarian can explain likely effects on eating and recovery.

Seek urgent veterinary care if your cat cannot swallow, has repeated bleeding, struggles to breathe, shows severe pain, becomes very weak, or has stopped eating and drinking. Mouth problems can worsen hydration and nutrition quickly, and breathing difficulty is an emergency.

Ask where the lesion began, whether a biopsy is needed, whether jaw or lymph-node imaging is appropriate, and what treatment aims are realistic. Ask how pain, food texture, hydration and oral hygiene will be managed during recovery.