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My dog has a lump under his tail. What is it? Should I see a vet?

Updated On September 23rd, 2025

Pet's info: Dog | Miniature Schnauzer | Male | unneutered | 15 years and 8 months old

My dog has this thing under his butt & i’m curious to know what it is . Took my dog to petsmart 2 days ago and they haven’t said anything. Should i take him to the vet ?

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1 Answer

Most Helpful Answer

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Answered By Sara Farmer, DVM

Veterinarian

Published on February 16th, 2019

It's a little difficult to tell in your picture, but it looks like there is swelling underneath BJ's tail. This could be a growth under the skin or something like a perineal hernia. Either way I think that you should have a vet examine BJ to determine what this might be.

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