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Why does my dog have itchy, marble-like bumps under his skin?

Updated On September 23rd, 2025

My dog got a bump that felt like a marble under his skin about 8 months ago. This is what it looks like today. Not a rash Its bumps like marbles under skin. And very itchy. What is this?

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1 Answer

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Answered By Shaneez Wallani, DVM

Veterinarian

Published on March 17th, 2020

Lesions like those in the pictures can be caused by bacterial, parasitic or fungal infection, dietary or environmental allergies or sensitivities, immune system disorders, or a combination of the above. In dogs like yours with hair loss and itchiness, one common cause can be infection by mites that can live in the hair follicles and lead to hair loss, and secondary bacterial and fungal infections that can develop. I recommend making an appointment to have your dog seen by your veterinarian to help determine the cause of the hair loss as soon as you can. The vet will likely want to look at a sample from the area (taken by a procedure known as a skin scraping) and examined under the microscope to determine what kind(s) of infection may be present and to figure out what medication is appropriate for treatment. I hope that helps!

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