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My cat has a red spot under his leg. What's causing it and what to do?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | neutered | 19 lbs

My cat has a little red spot under his leg that I just noticed. What could it be?

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1 Answer

Most Helpful Answer

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Answered By Daniel Fonza, DVM

Veterinarian

Published on November 24th, 2017

Hi there and thank you for using Pet Coach to address your concern. From the photo, it looks like it could be an insect bite or a skin mass. I would monitor this for the next 2-3 days and if it does not go away, I would recommend having your veterinarian examine this to help better determine what this might be. Testing such as fine needle aspiration in which a small needle is inserted into the mass and the cells are looked at under a microscope can be done to help determine what the mass might be so that the most appropriate recommendations can be made for treatment. I hope this helps guide you in the right direction! If you have any other questions or concerns, please do not hesitate to post them as I would be more than happy to help answer any others that you may have.

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