My cat has a bump on his mouth. Is it a dental problem or something else?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Male | unneutered | 3 lbs

My cat seems to have a small groth or infection on the side of his mouth. It dosen't seem to bother him much unless I am touching it directly.

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3 Answers

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Answered By Stacey Anstaett, DVM 224

Veterinarian

Published on December 31st, 2020

I suspect this might be what is called a "resorptive lesion." There is a tiny tooth right there, and for some cats, they develop lesions where the body actually breaks down their teeth over time. They can be painful. For some cats, they don't show any signs. Have him evaluated by your vet; they may recommend a sedated dental exam and dental xrays to evaluate the tooth roots. If roots are left under the surface, its potentially a source of infection and pain, and surgical removal of the root may be considered. Other possible causes of the bump would be inflammation, infection, (unlikely based on appearance), or an abnormal grownth/tumor. Get him in to your vet when you can to have it checked out. Thanks for asking Petco Pet Education Center, formerly Petcoach!

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My cat has a bump on his mouth. Is it a dental problem or something else?

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