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My dog has a hairless bump on his leg, but isn't bothered. What is it?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | neutered | 22 lbs

My dog has a bump on his leg, and the hair around it seems to have fallen off. Is this something bad? He doesn’t seem hurt by it, I haven’t noticed a change in energy nor appetite, it’s been there for maybe a week. What is it?

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2 Answers

Most Helpful Answer

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Answered By Dr. Massimo Orioles, DVM, Cert AVP, MRCVS

Veterinarian

Published on August 20th, 2019

Hi, and thanks for your question. This lump/bump/growth should be ideally examined by your local vet to have a diagnosis established. Your vet may want to perform an FNA (fine needle aspiration) or a biopsy to sample the bump and determine its underlying nature. Differentials would include skin cysts, infections, benign or more malignant type of tumors. Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further. If this answer was helpful please let us know, this will be used to improve our service!

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    Answered By Dr. Melanie, BVSc MS

    Veterinarian

    Published on March 4th, 2018

    Yes, I would have Iggy checked out by a vet especially because this bump is getting bigger. It could be a cyst or a benign tumor, and in very rare cases, it could be a malignant tumor. Any suspicious bumps 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 bump 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. I would take him into the vet tomorrow to have this bump examined and diagnosed so it can be treated. I hope this helps!

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