- In this work the Author takes up and updates Jung's theory of complexity, following the most recent contributions in the field by creating a bridge to describe the dissociative conditions of psychic trauma. This idea emphasizes how it can be correct to consider the trauma in its dissociative forms, and into the continuity of existence to activations sensitive and fixity of trauma in the body.Parole chiave: trauma, dissociazione, complesso, affetto, complessitŕ, individuazione.Key words: trauma, dissociation, complex, affect, complexity, individuation.