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Why does my cat have excessive ear wax in just one ear suddenly?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | spayed | 10 lbs

My cat has excessive ear wax build up in one ear. What could be the cause?

1 Answer

Most Helpful Answer

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Answered By Jennifer Summerfield, DVM CPDT-KA

Veterinarian, Certified Dog Trainer

Published on April 4th, 2017

Poor Kiara! Normal cat ears should not have any visible wax at all - so if you are seeing yellow, brown, or black waxy material in the ear, this means that she either has an ear infection or ear mites. Treatment will depend on what type of infection is present, so I would recommend taking her to the vet for an exam when you are able to. He/she can take a sample of the discharge for analysis to determine the problem and will prescribe appropriate medication to treat it depending on what is found.

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