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My 4-month-old puppy has small bumps on his penis. What are they?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Male | neutered | 45 lbs

My dog has two small pimples on the side of his penis. I am pointing to it on one of the pictures. He is about 4-5 months old (adopted)

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2 Answers

Most Helpful Answer

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Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on December 26th, 2017

Thanks for using Petco Pet Education Center, formerly Petcoach! This is likely a small focus of infection or pustule. Sometimes these do occur in puppies and go away on their own. Sometimes it does require antibiotics to take care of it. You can bathe him with a medicated shampoo containing chlorhexidine which you may get at your local pet store. You can bathe him twice weekly for 2 weeks. If it does not improve, have him evaluated by your veterinarian for further assessment and treatment. Good luck!

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    Answered By Jenna Beyer, DVM, MBA, cVMA

    Veterinarian, Certified Veterinary Acupuncturist

    Published on October 26th, 2018

    Many puppies will get these "acne"-like lesions. They will often resolve without treatment. Make sure that Sunny is on a good flea preventative, since this can sometimes be seen with flea bites. You can use an antibacterial pet shampoo 2-3 times a week at home. If you are continuing to see more bumps pop up, or if Sunny has additional symptoms like a poor appetite, fever over 102.5, vomiting, diarrhea, etc, he should see a vet.

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