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Why did my dog get lumps on her head that disappeared after being outside?

Updated On September 23rd, 2025

Multiple lumps suddenly appeared on my dogs head. An hour later, they were gone. Prior to getting the lumps, she was outside for a few minutes on our deck.

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1 Answer

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Answered By Dr. Elizabeth

Veterinarian

Published on December 14th, 2017

That appears to be an allergic reaction your dog was having! Many times you will never find out what caused it. Its a very good thing that it went down. Go ahead and give her an over the counter antihistamine for the next 24 hours. If the bumps come back, take her to the vet for a steroid injection. Thank you for using Pet Coach!

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