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Why does my cat have a hard bump on her back near her shoulder?

Updated On September 23rd, 2025

My female cat has a large hard bump on her back right after her shoulder blades,it's about the size of a half dollar and a inch high.

1 Answer

Most Helpful Answer

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Answered By Dr. Davis

Veterinarian

Published on September 10th, 2018

The most common lumps on cats are pockets of infection, or an abscess from a cat fight. An abscess is generally hot to the touch and painful and may cause a fever and lethargy. It also could be a tumor which often are non painful but can be malignant and will grow if not removed. Also some cats get a skin reaction to a vaccination if it’s given in that location and the swelling should improve over a week or so. I recommend a veterinary exam so they can feel the lump, take her temperature and decide if further treatment is needed. Thanks for using Petco Pet Education Center, formerly Petcoach to help you care for your cat.

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