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What's this growth on my male guinea pig's bum near his testicles?

Updated On September 23rd, 2025

Pet's info: Small Animal | Guinea Pig | Male | 2.4 lbs

Please help ASAP!! I’ve noticed that my male guinea pig has some type of growth or scab or something on his bum by his testicles and I’m not sure what it is. It looks so weird and I’m trying to research what it is but I don’t even know how to describe it. Any idea what this could be and is it bad?? Should I go to a vet?

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1 Answer

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Answered By Todd Cecil

Veterinarian

Published on May 4th, 2019

Thanks for reaching out about Teddy and including photos. This could be a sebaceous cyst or abscess. For now, wash the lesions with a mild soap, such as Johnson Baby Shampoo or Dawn dishsoap. If the lesion continue to grow or appears to be bothering Teddy, a veterinary visit is recommended. Good luck.

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