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My rat has a stomach lump. Is it serious? When should I see a vet?

Updated On September 23rd, 2025

Pet's info: Small Animal | Unknown - Small Animal | Male | unneutered | 1 year and 8 months old | 1lb

My pet rat has a lump on the side of his stomach

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1 Answer

Most Helpful Answer

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Answered By Andrea M. Brodie, DVM

Veterinarian

Published on April 23rd, 2018

This could be an abscess, a hernia or a tumor. Unfortunately tumors are common in rats, so if this started small and then grew to this size over time, it is likely a tumor. A tumor in this area is relatively easy to remove if you don't let it get too big, as the surgeon needs enough healthy skin to close the wound again after surgery. A hernia can be easily repaired surgically. You can check whether it is a hernia by gently pressing on the lump and if you can make it disappear into the abdomen, it is a hernia. An abscess will need to be lanced and your rat will need antibiotics. I suggest you schedule an appointment with a veterinarian soon.

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