Yeah that was my original point, I know it's not supposed to be that, it just so happened to be what I expected because of other people's reviews that I had heard.
What confused me is the significance of the rash. It was clearly not part of [blackout]her delusions because her mom saw it as well[/blackout]. Yet in spite of the nail clippings and lack of any scratching, it progressively gets worse and worse. I don't believe it was ever explained, but admittedly I did have to leave the theater for a very quick moment because of my cursed bladder. I doubt I missed anything though as it was in the middle of the film.