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My cat has a hard lump with dried blood near her tail. Is it serious?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Mediumhair | Female | spayed | 17 years and 10 months old | 22 lbs

Hi, I was just petting my cat and I noticed a small lump near her tail. It feels slightly hard and has dried blood on it. Please please please tell me what it might be and whether I need to get it checked out? Many thanks

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1 Answer

Most Helpful Answer

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Answered By Laura Johnson VMD

Veterinarian

Published on November 4th, 2017

Hi, thanks for using Petco Pet Education Center, formerly Petcoach! I understand your concern! It is hard to tell exactly what a skin mass is by just looking at it. You need either to biopsy or aspirate it for a definitive diagnosis. With that being said the bump on Kajoor appears to resemble a sebaceous adenoma. Which is more common in dogs. I would consider removing to for biopsy. If it is <8mm and Kajoor is a calm cat your Vet could consider removing it with a local block of lidcaine and a punch biopsy device. I hope this helps and I wish Kajoor the best!

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