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Why does my cat have red skin, bumps, and gashes after flea treatment?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | unspayed | 1 year and 2 months old | 6 lbs

So I have had Nala for over a year now, she was found as a 3 week old kitten in front of my job. About 5 months ago or so i noticed she started to have skin problems. She would have large gashes/ bumbs/ red skin all over her body. I took her to the vet and they told me it was a flea problem. They told me how to take care of it and i did. The problem continued still, so i got her a cone to maybe help keep her off her skin. Then i woke up to this on her chest! What do you think?

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1 Answer

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Answered By David Elbeze, DVM, MRCVS

Veterinarian

Published on July 31st, 2019

This is probably due to a severe allergy, although it could also be fleas or mites. First of all, in order to rule out skin parasites, you will need to treat her with a high quality flea treatment (e.g. advantage), then get her to the vet to perform a skin scrape - this might reveal an infection or a mite infestation. If all of those came back negative, the next step is to treat the allergy symptomatically and try discovering the cause of the allergy. Some medications can be given by the vet in order to repair the skin lesions (steroids and antibiotics). simultaneously you should start her on a prescription hypoallergenic diet for at least 2 months. Hopefully you will see some results after all this, if not you and your vet should consider putting her on a long term allergy treatment (Atopica).

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