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Why does my dog have black skin spots? Allergies, fleas, or infection?

Updated On September 23rd, 2025

Pet's info: Dog | Wire Fox Terrier | Female | spayed | 9 years and 9 months old | 20 lbs

Hello, I have a Wire Hair Fox Terrier who has awful allergies. Her skin seems to have a black coating, for lack of a better word, on several spots of her body. Is this common for types of fleas, mites or skin infections?

1 Answer

Most Helpful Answer

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Answered By Dr. Leigh, DVM

Veterinarian

Published on January 15th, 2017

She could have a skin infection, mites, fleas, ringworm, allergic dermatitis, etc. Your vet can do a skin scrape, cytology, or culture to help diagnose and then prescribe medications to treat the problem. She may need an antibiotic, anti-histamine, corticosteroid, or other medications depending on the cause. Make sure to treat her with a monthly flea medication like NexGard, Frontline, Advantage, or Revolution to prevent fleas.

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