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My dog has black armpits, genitals, and bumps on his belly. Normal?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | neutered | 8 years and 1 month old | 33 lbs

Our dog has black armpits and black area around his penis. Is this normal? He also has these big bumps on his belly.

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1 Answer

Most Helpful Answer

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Answered By Dr. Dayna, DVM, CVA

Veterinarian, Certified Veterinary Acupuncturist

Published on September 16th, 2017

Good questions. From the picture it looks like it may just be pigmentation changes. This can be caused by sun exposure, but also can be caused by chronic inflammation common with allergies. The bumps should be evaluated by a veterinarian to decide if they are concerning or not. Somtimes a needle aspirate done at the time of the appointment can give that information. I hope this helps!

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