Petco Text Logo
Petco Pet Logo

  • Two Easy Ways to Start Earning Rewards!

My guinea pig has a lump with grey discharge. Is it a sebaceous cyst?

Updated On September 23rd, 2025

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

Guinea pig has abcess thats pussing grey paste That we cleaned out with qtips

This question includes photos that may contain sensitive content. Click to view.

View more to consider that the photos may include sensitive content.

1 Answer

Most Helpful Answer

Image profile

Answered By Todd Cecil

Veterinarian

Published on October 29th, 2018

Thanks for reaching out about Sprou and including pictures. By the history and pictures, the most likely answer is a dermal (sebaceous) cyst. This condition is very common in middle aged guinea pigs. Keeping it clean as you did, is a good start. Clipping the hair around the edges to prevent further contamination is important. Ideally a veterinarian should be seen to have the cyst surgically removed, else it is likely to come back, over and over. Secondary infections of the open wound are also possible. Good luck.

Vote icon

1Pet Parents found this answer helpful

Related Questions

Petco Pet Education Center
Health & Wellbeing
What to do if my cat has a small hole with pus coming from its ear?
Is your cat's ear hole oozing pus? A Petco vet explains potential infections like abscesses from bites, advising immediate vet care, antibiotics, and recovery.
Updated on September 23, 2025
Petco Pet Education Center
Health & Wellbeing
My hamster has a lump and dry skin. Does he need a vet?
Is your active hamster showing a lump or dry skin? A certified veterinarian explains why immediate assessment is crucial for diagnosis and a treatment plan.
Updated on September 23, 2025
Petco Pet Education Center
Health & Wellbeing
What fish dog food helps dry skin if my dog eats Science Diet?
Is your dog's dry skin a concern? A certified vet offers expert advice on finding the best fish-based dog food alternatives to Science Diet for essential oils.
Updated on February 04, 2026
Petco Pet Education Center
What should I feed my red-eared slider? So much conflicting info!
A veterinarian offers expert advice on feeding your red-eared slider. Learn the ideal diet, including vegetables, pellets, and live fish, to help your turtle thrive.
Updated on September 23, 2025
Petco Pet Education Center
New Pet
My green cheek conure's voice is raspy and sneezy. Should I worry?
Is your green cheek conure's voice raspy or sneezy? A certified vet explains common causes like respiratory infections and advises on your bird's health.
Updated on September 23, 2025
Petco Pet Education Center
Feral cats leave dead animals. Is my indoor cat safe from disease?
Feral cats leaving headless rats? A certified vet explains why these are "gifts" and if your indoor cat is truly at risk. Get expert insights on feeding and managing feral cat interactions.
Updated on September 23, 2025
image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Book Now

Sponsored