Petco Text Logo
Petco Pet Logo

What's this growing pink bump on my cat's back that's oozing pus?

Updated On September 23rd, 2025

Pet's info: Cat | Siamese | Female | spayed | 11 years and 7 months old | 13 lbs

Cat has a pinkish bump on her back. Thought it was a skin tag about 6 months ago but it looks bigger today and has some white kind of chunky pus coming out now

1 Answer

Most Helpful Answer

Image profile

Answered By Linda G, MS, DVM

Veterinarian

Published on February 17th, 2020

Hello. This is probably a sebaceous cyst. Do not squeeze on it, but do clean it gently with a skin antiseptic like Hibiclens ( available at all pharmacies ). You might want to have your vet take a look just to make sure, as we can see other lesions that look similar. Thanks for using Petco Pet Education Center, formerly Petcoach.

Vote icon

1Pet Parents found this answer helpful

image
Have A Vet Question?

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

Sponsored