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My dog has a lump on his back. When should I be concerned?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Male | unneutered | 3 years and 7 months old | 6 lbs

My Chihuahua has a lump / mole on his back. Should I be concerned

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Answered By Jenna Beyer, DVM, MBA, cVMA

Veterinarian, Certified Veterinary Acupuncturist

Published on April 6th, 2020

I wouldn't be concerned at just this moment unless it is causing discomfort or gets bigger/changes color/ changes firmness, etc. Then it should be examined by a vet to determine if it needs to be removed.

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