Concerned about my snake.

[Diamond Serpents]

Does she try and push out of her enclosure with her mouth ?

It's definitely not that, it would be a open sore if it was from scraping rubing ect. This is more of a fungal/blister.

If you you look at early stages of mouth rot it doesn't just start out black and nasty it starts with fungal type blisters on the inside or outside of the mouth around the mouth areas of where your girl has this.

I need some more information that I should have asked for earlier.

How long has this been there for? How big was it when it started out? Where did it start on her and then spread to? Have you changed anything such as diet ( getting feeders any where else) ect?