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My dog's lump burst and isn't healing. What should I do at home?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Male | unneutered | 14 lbs

My dog has a huge lump on his back right above his tail and all of a sudden it opened up I don’t know if it burst or what but it appears to not be healing and I can’t afford to take him to a vet right now

1 Answer

Most Helpful Answer

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Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on November 15th, 2017

Thanks for using Petco Pet Education Center, formerly Petcoach! This could be a benign or malignant growth. This is often differentiated by a test called a fine needle aspirate (FNA) which is a pain free, inexpensive and easy procedure which in most cases will help reach a diagnosis. Sometimes a biopsy is needed for a definitive diagnosis. I recommend that you have her evaluated by your veterinarian for further assessment and treatment. You could consider taking him to the local humane society as it tends to be less expensive. Otherwise you can monitor it for now and have him examined if it progresses. I am really hoping for something benign. Good luck and have a good night!

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