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Expert QA

I recently took my 11-week-old kitten for its first shots, and now it has a bump on its back where it received the injections. Is another vet visit in order?


From the Editors of The Daily Cat

It is not unusual for a slight swelling to occur at the site of a vaccination. The small bump is usually a result of a localized reaction to the vaccine, and will normally subside within five-to-seven days. The bump is most often firm and remains small. If, however, the site seems to be soft and getting larger due to swelling, or is tender, it may be an abscess. This would require a follow-up exam by your veterinarian, and he or she can advise what needs to be done, if anything. Swelling at the vaccination site is not normally a serious situation, but if there is any doubt in your mind, you should not hesitate to call your veterinarian and bring your cat in for an exam.

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