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What is this swollen lump on my dog's tail that's cutting his hair?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Male | 8 years and 5 months old | 18 lbs

Hello, My name is Michael, My pet, Diego has a swallen part on his tail. It doesn't bleed but it cuts his hair on his tail. but i haven't take a consultation with the vet in here. may i know what kind of diseases is this? thankyou

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1 Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on November 27th, 2018

Hi Michael! This looks like a growth on Diego's tail, and it could be benign or malignant. Any suspicious lumps should be examined by the vet. The vet can perform a test called a fine needle aspirate on it. To do this, the vet sticks a small needle into the lump to get a sample of it's cells, and examines the cells on a slide under a microscope. It's usually painless to the animal, and relatively quick to perform. Once the cause of the lump is diagnosed, the vet can discuss treatment options with you. I'd give his vet a call today to make him an appointment. Best of luck.

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