her wound
Under the drug she took, she was able to remove the wooden stump and close the wound on her belly. But what about the one on her back? That tree branch went through her back before exiting on the front, yet she never closed that back wound.
Also she would've lost a lot of blood that first night (remember the trail of blood?) and while she was sleeping since her back wound was never closed, how many liters of blood did she loose anyway?
And like another poster mentioned, her hair turned dark brown with a few highlights in the back by the middle of the film.