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Dog has a bump near his anus. What could it be and what to do?

Updated On September 23rd, 2025

Pet's info: Dog | German Shepherd | Male | unneutered | 11 years and 5 months old | 43 lbs

Hi, I noticed a few days ago that my dog has a small bump right beside his anus. Pictures attached. What could this be and what would be the possible treatment. I'll be consulting a vet , just wanted a second opinion. Thanks.

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5 Answers

Most Helpful Answer

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Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on July 31st, 2018

Thanks for using Petco Pet Education Center, formerly Petcoach! This could be a benign or malignant growth. There is no way of knowing what it is just based on its appearance. Based on the location, often times these tumors are benign in nature and are known as perianal adenomas though about 10% are malignant and again it could be really any other tumor type. This is often differentiated by a test called a fine needle aspirate (FNA) which is a pain free, inexpensive and easy procedure which in most cases will help reach a diagnosis. Sometimes a biopsy is needed for a definitive diagnosis. I recommend that you have him evaluated by your veterinarian for further assessment and treatment. I am really hoping for something benign. Good luck and have a good day!

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    Answered By Ricardo Fernandez, DVM

    Veterinarian, Veterinary Oncology Resident

    Published on February 28th, 2018

    Thanks for using Petco Pet Education Center, formerly Petcoach! It is hard to know for sure without being able to evaluate Rascal though this could be a benign or malignant growth. Alternatively, this may be due to an infection for example. This is often differentiated by a test called a fine needle aspirate (FNA) which is a pain free, inexpensive and easy procedure which in most cases will help reach a diagnosis. Sometimes a biopsy is needed for a definitive diagnosis. I recommend that you have him evaluated by your veterinarian for further assessment and treatment. I am really hoping for something benign. Good luck and have a good night!

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    Answered By Mariya Gugel, DVM

    Veterinarian

    Published on January 15th, 2018

    Thank you for using Petco Pet Education Center, formerly Petcoach! The growth can be a mass, infected or inflamed anal gland, or a prolapse if it is donut shaped. I definitely recommend having this seen by your vet as soon as possible, as it can be pretty uncomfortable. In the meantime, you can get Ollie an E-collar or “cone” if he is licking the area to prevent further trauma.

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    Answered By Megan, DVM, CVA

    Veterinarian

    Published on August 18th, 2017

    This is most likely a benign skin tumor that is just an awkward place. BUT it could also be some other masses that are cancerous. I would take him to your vet tomorrow or Monday and have them do a cytology of it to ensure it isn't cancerous. Either way I would talk to your vet about removing it. Due to its location it is likely much easier to remove now while it is small instead of waiting until it gets large and involving the surrounding delicate structures. I hope this helps!

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    Answered By Ricardo Fernandez, DVM

    Veterinarian, Veterinary Oncology Resident

    Published on August 22nd, 2017

    Hi there! Thanks for using Petco Pet Education Center, formerly Petcoach! I definitely recommend that you have him examined by your veterinarian so that diagnostics can be performed to see if any therapy will be needed based on the findings. Your veterinarian will likely perform a test called a fine needle aspirate which helps to identify the origin of a mass. I would just leave the area alone and try to avoid contact with the irritated portion. Otherwise, there is no particular need to do any sort of treatment at home in the meantime. Good luck! Keeping my fingers crossed that everything goes well!

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