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My dog has a red, sore lump on his penis. When should I see a vet?

Updated On September 23rd, 2025

Pet's info: Dog | Greyhound | Male | neutered | 8 months and 6 days old | 39 lbs

hello, over the last few days I have noticed a very small blister like lump near the opening of my dog's penis. It's red/purpleish in colour and is causing him no discomfort or problems with peeing, but to me looks quite sore. Another dog licked the area earlier today as if to suggest a problem

1 Answer

Most Helpful Answer

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Answered By Jessica Desrosiers

Veterinary Technician

Published on November 14th, 2016

It's possible something may have irritated Barley's penis, causing the blister you are seeing. It is best to keep the area clean and dry and prevent him and other dogs from licking or chewing at the spot. If it doesn't clear up in a day or so, becomes bothersome, or affects his ability to urinate, it is best to have a vet take a look to see if there is a possible infection or other issue causing it.

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