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My dog won't stop licking her tail. What is that green lump?

Updated On September 23rd, 2025

My dog keeps licking her tail and there is a red lump which appeared to have a green coloring after a day. She will not stop licking it

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1 Answer

Most Helpful Answer

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Answered By Rodrigo Roca, DVM

Veterinarian

Published on November 19th, 2017

Hello, that looks like a local skin infection. This could be secondary to fleas or or some prior local irritation which causes itchiness and a subsequent infection, This could respond to antibiotics if the infection is bacterial. Other kind of infections include parasites and fungal infections which are less likely. I would recommend having the area looked at by your veterinarian as it may need either topical or oral antibiotics to treat. Additionally, ensure your dog is on adequate monthly flea prevention and in the interim, you can put an e-collar on your dog to keep the area protected from the licking which could make it worse. Hope this helps and best of luck.

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