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My cat has a new dark blue/black spot on her butt. Should I worry?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Female | spayed | 1 year and 1 month old | 8 lbs

Hi, this random spot popped up on top of my cats butt area. I tried to gently wipe it with a warm rag and it’s still there. Should I be concerned? It’s like a dark blue/black color. My cat has been walking around fine and still active

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1 Answer

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Answered By Jessica Desrosiers

Veterinary Technician

Published on February 2nd, 2024

Some discoloration/skin changes can be normal with age, however if the area is rapidly changing color, the spot loses hair, is painful, or you notice signs of cuts or infection (open wounds, oozing debris, pain to the touch, etc) it is best to have your vet take a look to rule out issues such as an infection or injury to the area. I would keep an eye on the spot to monitor for any changes, and keep Sweetie from licking or chewing at it with the use of an Elizabethan (cone) collar as needed, as well as keep the area clean and dry. If the spot doesn't improve or worsens, a vet visit is best.

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