My Cats Lip!

[Mother_Superior]

My cat has something on her lip, it's been showing for a while now and it seems to be moving to her bottom lip.

 

[CatDan86]

One of ours has something similar and it’s flared up a couple of times. We initially thought it was a Rodent Ulcer but the vet says it’s a localised problem with her immune system caused by some sort of bacterial infection. For our Clem, a course of antibiotics for a couple of weeks cleared it right up, but the vet thinks it is something she’ll get on and off for the rest of her life.

 

[duckpond]

I would have her in for a vet visit. Especially since it seems to be spreading. I would want to take care of it now, before it gets worse.
Best of luck and keep us updated!