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Why is my dog's red belly lump growing and changing? Is it serious?

Updated On September 23rd, 2025

My dog has a red lump on his belly, which is growing. The lump used to be a flat red spot, but it’s now lumpy. Does this look dangerous, or something harmless?

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1 Answer

Most Helpful Answer

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Answered By Megan, DVM, CVA

Veterinarian

Published on April 28th, 2018

Poor Baby! Due to its dark color and it's changing nature, I would have your vet take a look at it. It could just be a benign blood cyst and nothing to worry about, but it could also be a malignant tumor that needs to be safe. If your vet isn't sure, I would have it surgically removed and sent to the lab for testing to be on the safe side. I hope this helps!

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