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My cat has a purple-red lump on his side near his leg. Is it serious?

Updated On September 23rd, 2025

Pet's info: Cat | Siamese | Male | unneutered

My cat was outside yesterday and came back last night with a knot/lump on his side by his front left leg it looks to be purple and red should i be concerned????

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1 Answer

Most Helpful Answer

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Answered By Andrea M. Brodie, DVM

Veterinarian

Published on November 25th, 2018

This could be a bruise (hematoma) or a developing abscess. Your kitty could have gotten into a fight with another cat. I would observe it. It it starts hurting your cat or is fluctuating, or if your kitty is getting lethargic or stops eating he needs to be seen by a veterinarian for an exam.

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