Looks like a kink to me. If she was born with it, you shouldn't worry about it now. It doesn't look like it will keep her from having a healthy life.
I see you are using half log hides. I would recommend trashing those and getting some of the rock cave type hides. Make sure that the snake barely fits inside. Tight spaces make them feel more secure. A hiding BP is a happy BP.
You can also cover the back and sides of the tank with dark paper. This will also help insulate the tank a little bit. Even more if you use a material such as reflectix or foam core board.
If she is in a 10gallon right now, keep her in that until she starts eating.