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Why is my dog's mouth sore getting bigger? What should I do?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | neutered | 8 lbs

My dog got a sore on his mouth about 3 days ago and I have no idea what it is but it seems to be getting bigger. What is it?

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1 Answer

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Answered By Tomasz Wnuk

Veterinarian

Published on July 8th, 2020

Hello and thank you for contacting Petco Pet Education Center, formerly Petcoach. It looks like acne. The other possibility is diffuse skin infection. Please, take Prince to your local vets as he will likely need a cream / ointment with antibiotic and anti-inflammatory agent. These medications are prescription-only, so they must be prescribed by a vet.

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