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My female guinea pig has hard lumps on her belly. What should I do?

Updated On September 23rd, 2025

Pet's info: Small Animal | Guinea Pig | Female | unspayed | 3 lbs

Female guinea pig, about 3 years old, has two hard lumps on abdomen size of quarter. What is this and what do we do?

1 Answer

Most Helpful Answer

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Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on October 17th, 2018

Without an exam or diagnostics, it is impossible to determine what the lumps may or may not be. Cancer is rare in guinea pigs, though it is possible given her age. Infection or trauma are also possibilities. An exam with your veterinarian would be recommended. A fine needle aspirate can be done in the clinic to collect samples for pathology. This may provide a diagnosis after which treatment options can be discussed.

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