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My dog suddenly has welts on his face and body, what's wrong?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | neutered | 40 lbs

My dog has welts all over his face and a few on his body all of a sudden

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1 Answer

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Answered By Andrea M. Brodie, DVM

Veterinarian

Published on January 10th, 2019

This sounds like your dog has an allergic reaction to possibly an insect or spider bite or allergen. As long as your dog has no problems breathing or does not appear ill, you can wait it out. Should your dog have breathing problems or appear ill, vomits or the welts do not go away within 12 hours, you should take Romeo to your veterinarian or a petER for an exam, an antihistamine and/or a steroid injection.

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