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My dog's tail lump grew after grooming. When should I see a vet?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | unneutered | 5 years and 4 months old | 90 lbs

Hello, my labradoodle has a rather large lump on his tail. It's been there for a couple months now but has just recently gotten bigger after he was groomed. Should I take him to the vet?

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1 Answer

Most Helpful Answer

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Answered By Dr. Davis

Veterinarian

Published on September 3rd, 2017

This looks like an infected cyst. Dogs have a scent area on their tails that can enlarge and get infected such as this. You can apply a hot compress to the area several times daily to see if it will drain. That will increase the blood supply to help it heal faster. Bringing Ben in for an exam would confirm a diagnosis and they would probably prescribe antibiotics which would lessen the healing time. This doesn't look like a mass to me, so it should resolve quickly with treatment. Thanks for using Petco Pet Education Center, formerly Petcoach to help you care for Ben.

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