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My cat has a painful, growing, squishy lump on his side. What is it?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | unneutered | 1 year and 9 months old

My cat has a lump on his side that has been growing the past week getting close to golf ball size. It's very squishy and is painfull for my cat if touched or when he is moving around

1 Answer

Most Helpful Answer

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Answered By Lauren Jones VMD

Veterinarian

Published on May 24th, 2017

One of the most common causes of soft, painful lumps in young cats is an abscessed wound. Other possibilities include a cyst or benign or malignant mass. At this point, your best bet is to take Cat to the vet for evaluation. The vet will be able to evaluate the lesion and may need to draw some cells out of the lump for microscopic analysis. If an abscess is diagnosed, the vet may need to drain and flush the area, as well as start Cat on a course of antibiotics. I hope that all goes well!

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