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What's this pink swollen spot on my cat's mouth? How do I treat it?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | spayed | 3 years and 2 months old

Our cat has a raised pink swollen area on the corner of her mouth, what could this be and how do we treat it?

1 Answer

Most Helpful Answer

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Answered By Jennifer Summerfield, DVM CPDT-KA

Veterinarian, Certified Dog Trainer

Published on August 28th, 2016

There are a number of things that this could be. Cats can get small pink raw spots or swollen areas on their lips called rodent ulcers, which are caused by allergies. Other possibilities would include an insect bite or local inflammatory reaction of some kind, a localized bacterial infection, or even some type of tumor. Unfortunately, there isn't anything over the counter that can be used to treat any of these problems - you can monitor the swollen area for the next few days to see if it resolves on its own, but if it doesn't or if it seems to be getting larger, then Alaska will need to be examined by a vet. He/she can do some simple skin tests if needed to help determine the problem and get her started on appropriate medication to treat it.

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