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What's causing my 7-month-old cat's back wound to keep growing?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | 7 months old

Male cat roughly 7 months has a large wound on his back. Started from a small scratch which we then applied antibiotic cream to help it. It grew, originally thought it was healing and he was breaking scab off but it kept growing. We visited vet which they said it doesn't seem to be an abscess and are unsure what it is. They have given him a shot of antibiotic through needle then a cream to apply 2/day though no improvement. Also gave him steroid injection after 1wk. Surgery is next. What is it?

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1 Answer

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Answered By Mara Howard, DVM

Veterinarian

Published on May 1st, 2018

Thanks for using Petco Pet Education Center, formerly Petcoach! I'm sorry to hear Rory has been having such skin issues. Nonresolving skin lesions can be due to a variety of causes, including severe trauma and necrosis of the skin, a resistant bacterial infection, or an immune disorder, among others. If it is non-resolving, it may need surgical removal in order for the rest of the skin to heal, and a culture for a resistant infection and a biopsy can be done in order to determine further what may be going on. Good luck!

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