Dog lumps, bumps, cysts, and tumours: treatment and prevention

Worried about a lump you spotted on your dog? Look at our list of common lumps, and see if you should get advice from your vet.

Photo of a dog being checked for lumps and bumps. Lumps in dogs can be benign or cancerous, and it's always a good idea to have them checked.

Overview

Finding a lump on your dog can be alarming — but in many cases, there’s no need to panic. Lumps can be harmless and common, especially as dogs get older. These might include fatty lumps, cysts, or skin growths that don’t pose a threat to your dog’s health. Others, though less common, could be more serious and need treatment.

It’s important to know what to look out for and when to seek advice. The sooner a lump is checked by a vet, the sooner you’ll know what it is — and what to do next.

How do vets classify lumps and bumps?

What are the most common benign lumps on dogs?

What are the common cancerous lumps?

Could a lump be something else?

What are the signs that my dog’s lump is dangerous?

How do vets diagnose lumps in dogs?

How do I check my dog for lumps?

Dog lumps and bumps FAQs

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Medically reviewed by Lizzie Youens, BSc(Hons) BVSc MRCVS

Published on 16/01/2026 • Reviewed on 16/01/2026