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My dog keeps biting her tail. Why is it sore and what's wrong?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Female | unspayed | 77 lbs

My dog has started biting her tail, it looks very sore and she won’t let me near it. I’m wondering if she’s been bitten by something

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1 Answer

Most Helpful Answer

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Answered By Dr. Dayna, DVM, CVA

Veterinarian, Certified Veterinary Acupuncturist

Published on December 14th, 2017

Ouch! That does look sore. At this point I would likely call that moist dermatitis which is a skin infection that needs antibiotics. Certainty a bite or sting can start it off. Also, they have a tail gland about 1/3 of the way down the tail that can become infected. It is hard to tell from the picture where on the tail this is. I would encourage you to have her evaluated by your veterinarian soon. In the meantime if she will let you out a warm water and Epsom salt compress on it that may improve her comfort. Best of luck and I hope she improves soon. Thank you for using Pet Coach.

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