Petco Text Logo
Petco Pet Logo

My neutered male cat has a swollen, red, crusty nipple. What's wrong?

Updated On September 23rd, 2025

My neutered male cat has a swollen, red, crusty nipple. We've been watching it and it has gotten bigger. Is it most likely an infection or cancer..?

1 Answer

Most Helpful Answer

Image profile

Answered By Jessica Desrosiers

Veterinary Technician

Published on December 25th, 2015

It would be hard to determine what the growth is without having it examined by a vet. Infections such as abscesses often are hot to the touch, painful, swell rapidly and may ooze debris from them if they pop open. Tumors and other growths may have different rates of growth and may or may not be bothersome to your cat. It is best to bring him into your vet to have the area looked at, and it may be drained or aspirated to take a sample for sending off to the lab. If the area is an infection, it can be drained and antibiotics given to prevent its return. Until you can get to the vet it is best to not allow your cat to lick or chew at the area with the use of a T-shirt or Elizabethan (cone) collar so that bacteria or a secondary infection are not introduced.

Vote icon

20Pet Parents found this answer helpful

image
Have A Vet Question?

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

Sponsored