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My dog has a hard lump where he got his vaccine. Is it normal?

Updated On September 23rd, 2025

Pet's info: Dog | Pug | Male | neutered | 3 years old

Last night, I noticed a hard, oval-shaped lump under Bruce's skin right by one of his shoulder blades. It doesn't seem to bother him at all, and he seems healthy aside from that. I noticed it's in the same place he got his vaccines last week and a few weeks ago. Is this normal, or something to be concerned over?

1 Answer

Most Helpful Answer

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Answered By Eryn Taormina, DVM

Veterinarian

Published on July 21st, 2018

Hi there! I'm sorry to hear about Bruce's lump. Vaccinations can definitely leave behind a small bump at times. If this happens after I vaccinate a dog, I will have the client bring their pet in so I can examine the spot, make sure that it coincides with where I gave the vaccine for sure. If it is something new rather than a lump from the vaccine, it can be addressed accordingly. As long as it is just from the vaccine, then we monitor the spot over the course of a few weeks. If it is a localized inflammatory response to the vaccine, it usually will go away over time. If it persists, some clients will opt to have me remove the tiny lump and test it to make sure it just comes back as an inflammatory response and not something serious. I would definitely call your veterinarian and have Bruce get a quick examination to make sure all is well, and you will likely just monitor the lump going forward. I hope you find this answer helpful. Best of luck!

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