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My puppy has a balloon-like bump near his penis. Is it normal?

Updated On September 23rd, 2025

My puppy has what looks like a balloon or bump near his penis. Should I be worried?

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3 Answers

Most Helpful Answer

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Answered By Debi Matlack

Veterinary Technician

Published on March 31st, 2015

If what you're seeing looks like a symmetrical swelling near the base of his penis in front of the scrotum, what you see is likely the *bulbus glandis*. This structure is a normal part of the male dog's anatomy. The *bulbus glandis* swells during [mating](https://www.petcoach.co/article/anatomy-and-function-of-the-reproductive-system-in-dogs) which causes the dogs to tie or 'lock' together during the act. It may swell when the dog is excited, even in a neutered dog.

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Other Answers

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    Answered By Dr. Elizabeth

    Veterinarian

    Published on August 16th, 2019

    It is likely you are seeing a swelling in Cloud's bulbous penis. This swelling will eventually go down on it's own. Its the structure in the penis that allows to 'lock' during mating. I hope this helps and please feel free to post any additional questions.

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    Answered By Dr. Melanie, BVSc MS

    Veterinarian

    Published on August 14th, 2018

    What you may be seeing is Willo's bulbourethral glands. These are glands that swell when dogs get sexually excited, and sometimes when they urinate. It's a normal part of a dog's anatomy. I hope this helps!

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    3Pet Parents found this answer helpful

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