My dog's scaly black spots are spreading. Is it fungus? How to treat?

Question

My dog started out with just a scaly spot on her back. The spot was black. Now they have spread over her back. They cleared a lot when bathed in oatmeal, but our groomer said she thinks she has a fungus. How should I treat this? Pet's info: Dog | Mixed Breed Small (up to 22lb) | Female | spayed | 10 years and 5 months old | 19 lbs

Jenna Beyer, DVM, MBA, cVMA · Accepted Answer

There can be many causes of increased pigmentation in dogs, mostly relating to chronic inflammation. This can be caused by fleas, mange, lice, infections (bacterial or yeast), ringworm, allergies, among others. If the spots seem to be increasing, I recommend that Sophie be evaluated by a veterinarian. Also, make sure she is on a good flea preventative (topicals should not be applied for 3 days before or after bathing to ensure good absorption). While you wait for your vet appointment, you can try a medicated shampoo like Dechra MalAcetic Ultra Shampoo - lather on the skin, let it sit for 5 minutes, then rinse thoroughly.

My dog's scaly black spots are spreading. Is it fungus? How to treat?

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