Hard to say if it an active abcess or maybe already burst as I see a hole. But it's awful close to her eye. I would bring her to a vet. Is she a healthy weight? Neck looks a bit thin but may just be the photos.
I agree something about the jaw isn't quite right. Never seen bottle jaw in person, but that's what came to mind.
It is not in quite the right place for a CL abscess (but it needs to be ruled out) so that's some consolation.
There are several conditions that can cause an abscess on her cheek, and they are not scary like CL.
She looks very uncomfortable with that though. This is a case where a vet should be utilized, in my most humble "I like to do it all myself" opinion.