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My dog has a soft lump at vaccine site. Is it normal? Will hot compress help?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | neutered | 3 months and 27 days old

Pocholo was given a vaccine last December 26,2016. Just today, I noticed a small soft lump on his skin at the back where the injection was administered. It's like a cyst with water inside because it's very soft. Is Pocholo be okay and if I will apply a hot compress, will it be gone?

1 Answer

Most Helpful Answer

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Answered By Jennifer Ladd, DVM

Veterinarian

Published on January 6th, 2017

A hot compress is a great idea. I would do this twice daily. Massaging the area is also very helpful. It is likely an immune response to the adjuvant in the vaccine. This is not the pathogen that the vaccine is designed to protect against but rather the solution that holds the vaccine. Please monitor closely.

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