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Why is my dog so itchy with red, flaky skin patches in summer?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | unneutered | 10 years and 4 months old | 40 lbs

Hello, My dog during the summer gets a really bad itchy red flaky patch on his lower back near his tail, around the back of his legs, his lower stomach and around his bum. He's constantly itching and we've tried medicated shampoo, washed him and brushed but it won't go?

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1 Answer

Most Helpful Answer

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Answered By Vanessa Yeager DVM MPH

Veterinarian

Published on August 24th, 2017

Hi there and thank you for your question. The first thing that needs to be completely ruled out first is a flea allergy. It only takes one flea to induce a flea allergy. Having Sam on a efficacious year round preventative will very beneficial. If after a few months of using a flea preventative and the patch does not dissipate or improve, then I could be suspicious about a seasonal allergy (like grass or pollen or rag weed, etc). A veterinarian can be able to determine what other environmental allergy he has through an allergy test. Once that has been determined, Sam can be on the appropriate treatment (allergy injections or certain medications can help). First rule out flea allergy though by having Sam on a month to month preventative!

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