Petco Text Logo
Petco Pet Logo
  • Two Easy Ways to Start Earning Rewards!

    rewards header
    Become a member today!
    Members-only pricing and offers, personalized care notifications, Vital Care points back on every purchase and more!
    Petco Pay LogoBecome a credit card member today!

    Earn 2X Pals Rewards points at Petco
    when you use Petco Pay!

    APPLY NOW
    Learn More About Petco Pay Benefits

What's causing my cat's red, swollen, weepy mouth with black specks?

Updated on September 23, 2025

Pet's info: Cat | American Shorthair | Male | neutered | 5 years and 3 months old | 12 lbs

On Monday or Tuesday, I noticed that one of corners of my cat's mouth appeared red and swollen. And, on the inner side there was a small circular white patch. Today I noticed it looks worse. It looks a bit weepy, and he doesn't close that side of his mouth. Sometimes it seems like he has a bit of trouble eating. He also has black specks on the side of his mouth that were never there before. Any insight is greatly appreciated.

1 Answer

Most Helpful Answer

Dr. Melanie, BVSc MS

Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on April 16, 2020

It may be Penney has an infection causing these red spots and it sounds like it may be causing him pain to eat. I'd have him seen by a vet first thing in the morning to get this diagnosed and treated. I hope this helps!
Vote Icon2Pet Parents found this answer helpful

Smart Picks for Smart Questions

Have A Vet Question?

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

Share

Styled arrow button