There are many scenes of stabbing, self-mutulation, and bloody/disturbing images.
Compared to the sexual content, the violence in the movie is far more intense and graphic than the sexuality and more pervasive.
Some ballerinas go through painful physical therapy in one scene. We hear joints crack at one point
Contains strong violence and injury detail
Nina's increasing neuroses are manifested in a bizarre, unconscious kind of self-mutilation. Repeatedly she picks at the skin around her fingernails and scratches her back viciously. She has awful hallucinations in which she sees herself tearing bloody strips of skin away from her fingers.
Several camera shots focus on Nina's battered feet. We watch as she attends to black, broken and bleeding toenails. (The overall effect depicts ballet as an art form that requires something like self-torture and mutilation in order to perform it.)