The Yellow Wallpaper is an allegory to the inner pressures and entrapment of women when assigned by society to fulfill a specific role.
The main character is a woman obviously stricken with a tremendous case of PTSD or Post Partum Depression that is completely underrated by her husband as the doctor. Society also ignores the situation of women in general afflicted by illness as a mere case of ill nerves.
However, the affliction she suffers is so intense that her brain begins to play tricks on her, making her believe that there are figures wanting to come out of the Yellow Wallpaper because they are (like her) trapped inside.
Meanwhile, as neither the doctor nor the husband care to find a proper cure or treatment, her condition goes unanswered, and society (as a whole) continues to vindicate women and their needs to an empty, maddening, role of ignorance.
Conclusively, the feminist issues revealed in the story include: The needs of women being underrated, the health of women being considered a secondary need, the psychological afflictions of women not being taken in to consideration, and the inner battles of women and their natures against the pre-established roles that society has established for them.