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My guinea pig has a strange lump attached to her skin. Is it serious?

Updated On September 23rd, 2025

This was attached to my guinea pig! Please help! I think she’s dying or something!

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1 Answer

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Answered By Miranda Sadar, DVM, DACZM

Veterinarian

Published on April 23rd, 2019

Thank you for your question about your guinea pig, and thank you for the photo. I didn't see you mention whether or not there was a wound left when this was removed, or if it was attached directly to the skin and hair. The material looks like it could be an abscess or a mass. An abscess is an infection and this often results from injuries from the cage or from cagemates (such as a bite wound). The masses often occur in older guinea pigs - I didn't see how old your guinea pig was. I would recommend taking your guinea pig to a veterinarian if there is any sign of a wound from where this material was. If this is the case, they can provide your guinea pig with some antibiotics to fight any remaining infection that may be present. If there is no wound present and it just looks like the skin is intact with no defects, then you can monitor your guinea pig for anything that is out of the ordinary for her. This would include changes in attitude, appetite, behavior, poops, or urine. I hope this gives you a place to start, and that your guinea pig feels better soon.

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