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My Shih Tzu has dark brown skin patches spreading. Is it serious?

Updated On September 23rd, 2025

Pet's info: Dog | Shih Tzu | Male | neutered | 1 year and 3 months old

Hello, my one year old Shih Tzu started to get dark brown patches on his stomach which has spread all over his body under his white fur over the last couple of months. It isn’t itchy apart from the last week where he has been occasionally biting at his back left leg but I’m not sure if this is related. His fur has not gone thicker nor does he smell (which is what I’ve read online to look for). Could this just be hyper pigmentation or an underlying serious condition?

1 Answer

Most Helpful Answer

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Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on August 2nd, 2018

Thanks for using Petco Pet Education Center, formerly Petcoach! It is hard to know for sure based on a description though this is likely a normal pigmentation change or hyperpigmentation as you pointed out. If it is not associated with itchiness or discomfort, there is no need to be concerned about this. If you ever notice any discomfort or itchiness, have him evaluated by your veterinarian for further assessment and treatment. Good luck and have a great day!

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