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My cat's vaccine site is painful and swollen. Should I see a vet?

Updated On September 23rd, 2025

Pet's info: Cat | Turkish Angora | Male | neutered | 5 years and 7 months old | 11 lbs

I moved my cat from Mexico City to San Diego two days ago. On Tuesday a vet gave him a vaccine shot near his tail and he moved so the needle slipped out, she stuck it back in and finished the injection. Today I was petting him and when I touched near his tail he cried out, after exploring it a bit more, its definitely the injection site, it's hard to tell but I think I feel some swelling. Should I take him in tomorrow or wait a bit, if so how long? Overall, he's not a happy camper.

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1 Answer

Most Helpful Answer

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Answered By Sara Farmer, DVM

Veterinarian

Published on December 15th, 2018

It sounds like Coco is having a local vaccine reaction. You should contact your vet and see if they want to examine him or if they would be able to prescribe medications, and if they agree it’s a vaccine reaction they might recommend medication prior to vaccines in the future. I doubt it’s related to the trouble giving the vaccine - it’s pretty common for the needle to slip out when giving injections to wiggly dogs and cats.

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