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Why did my dog's mouth swelling move from one side to the other?

Updated On September 23rd, 2025

Pet's info: Dog | Siberian Husky | Male | 1 year and 6 months old | 44 lbs

Mouth swollen was from first side then disappeared now in other side of the mouth

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2 Answers

Most Helpful Answer

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Answered By Laura Johnson VMD

Veterinarian

Published on February 14th, 2018

Hi, thanks for using PetCoach! Poor Jasper! It looks like he’s having an allergic reaction. Sometimes it resolves but can return quickly or it goes towards the dependent side. So if he was laying for a long time on the right side the edema may have shifted. Allergic reactions can be from insect bites, vaccinations or medications. Allergic reactions are treated with steroids and Benadryl. You can read this article and see if it helps: https://www.petcoach.co/canigive/dog/benadryl/ I hope this helps!

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    Answered By David Elbeze, DVM, MRCVS

    Veterinarian

    Published on September 10th, 2018

    This is probably an allergic reaction due to an insect bite or a plant outside. those reactions tend to resolve within 48 hours without treatment. if the swelling becomes too large or if your dog is lethargic, take her to the vet in order to get an antihistamine injection.

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