Literally the whole left side of her face was ripped open, you could see her fucking teeth, she was practically dead, then they did a DIY stitch job and she was fine, now its just a few tiny lines on her face, not even a big deep scar, just as if a cat scratched her.
I mean out there with no medicine, nothing to properly clean the wound, disinfect it, just some dirty rags wrapped over it, that would've been infected as hell.
I agree with you, and it is ridiculous. But maybe the god of the wilderness helped to heal her? I know that's unrealistic, but this is a tv show and supernatural elements are in it.
Van actually did a "second" resurrection for Season 2 - by being alive as an adult when it was assumed in season 1 that she was not alive in Season 1. Maybe there's more to Van.
In a deleted scene from "Burial" (Showtime released the script), Lottie specifically asks Van to clean up the cabin, saying that the wilderness sees her as a cleaner because of her "clarifying energy".