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My female rat has a lump in her armpit. Is it a tumor? What to do?

Updated On September 23rd, 2025

Pet's info: Exotic | Unknown - Exotic | Female | unspayed

I recently found a lump on my female rat's armpit. I have talked to my cousin about her and she said it might be a start of a tumor. She recommended i ask help online since i dont have a vet to take her to.

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on January 19th, 2017

Rats are prone to tumors, and so it is possible that Aim has one in her armpit. There are vets who will see rats, so I'd recommend calling around local clinics to see if there is a vet who will see her. Sometimes, the tumors can be removed surgically, so that may be an option worth exploring.

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