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My dog has a hard jaw lump that keeps coming back. Is it serious?

Updated On September 23rd, 2025

Pet's info: Dog | Boston Terrier | Male | neutered | 9 years and 2 months old

Is this normal my dog has a lump under his jaw it goes down a bit with Benadryl but it keeps coming back and it feels hard should I be concerned

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1 Answer

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Answered By Dr. Heidi DVM, CVA, CCRT, CVTP, CVSMT, CVCH

Veterinarian, Certified Veterinary Acupuncturist, Certified Canine Rehabilitation Practitioner

Published on May 31st, 2018

I would not consider that to be normal. I would recommend having your veterinarian examine Butch to see what they think about the swelling. Your vet can perform a simple test called a fine needle aspirate where they use a small needle to collect some cells from the mass, then look at them under the microscope. They may even need to send the cells to the lab for a pathologist to examine them, so we know what the mass is and can determine the best way to treat it. Good luck! I hope that was helpful. Thanks for using Petco Pet Education Center, formerly Petcoach.

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