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My dog has red blotchy skin. Is it serious? When should I see a vet?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Male | neutered | 1 year and 6 months old | 70 lbs

Zeus had red blotchy skin should I be concerned

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1 Answer

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Answered By Andrea M. Brodie, DVM

Veterinarian

Published on July 13th, 2018

Red blotchy skin is almost always a sign of a dermatitis, which could be caused by bacteria, a fungus or an allergy or a combination thereof. These can be itchy and irritating and cause the dog to lick the area spreading the problem. The location is also typical for a flea allergic dermatitis, so if you have not been doing flea prevention, then now is the time to do so. I see a yellow pustule on the photo which points to a bacterial infection as well which will need to be treated with prescription antibiotics, either topical or systemical. You will need to take Zeus to your vet for an exam, preferably before the weekend.

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