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Is my dog's red belly rash and swollen ears an allergic reaction?

Updated On September 23rd, 2025

Pet's info: Dog | English Bulldog | Male | neutered | 1 year and 2 months old | 65 lbs

My dog has a rash on his belly. It's red and splotchy, and looks like some spots he's scratched so they are a little worse. His ears seem swollen as well. The rash seems to bother him slightly, but he isn't whimpering like it hurts. I haven't changed any of the laundry detergent, food or soaps. Is this an allergic reaction?

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1 Answer

Most Helpful Answer

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Answered By Ann Dion, DVM

Veterinarian

Published on August 30th, 2017

Hello and welcome to Petco Pet Education Center, formerly Petcoach. There seems to be two different types of 'spots' on Baxter. The pinky raised ones look like an allergic reaction, and the type that is usually caused by a bug bite. This would also make his ears swell and maybe his face including his muzzle/jowels and around his eyes. This will go away with time, and you can give him Benedryl as well, at a dose of 2mg/kg (which is about 50mg for a dog of Baxter's size). Please make sure the only active ingredient is Diphenhydramine, and that you don't get a 'non-drowsy' version as these have other drugs that are VERY toxic to dogs . The other spots that are only on his left side, under his left arm and down his left side, look like bruising on the picture, and more of a scratch, almost like road rash. If this is new as well then I would recommend getting Baxter seen right away, especially if he has no history of a big trauma. The bruising is especially worrying if he hasn't had a big hit/accident, as it is worrying for a clotting disorder. Best of luck with Baxter.

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