The narrator is fixated on the wallpaper, she describes it as revolting. She begins to focus on the pattern in the wallpaper. The sub-pattern now clearly resembles a woman who is trying to get out from behind the main pattern. The narrator sees her shaking the bars at night and creeping around during the day, when the woman is able to escape briefly. The narrator mentions that she, too, creeps around at times. She suspects that John and Jennie are aware of her obsession, and she resolves to destroy the paper once and for all, peeling much of it off during the night. The next day she manages to be alone and goes into something of a frenzy, biting and tearing at the paper in order to free the trapped woman, whom she sees struggling from inside the pattern(Perkins Gilman 113-126).
By the end, the narrator is hopelessly insane, convinced that there are many creeping women around and that she herself has come out of the wallpaper and that she herself is the trapped woman(Perkins Gilman 113-126). Gilman uses The Yellow Wallpaper to show the position of women within the institution of marriage. Gilman describes how women were second class citizens