Psychotic symptoms may be relatively prevalent in posttraumatic stress disorder (PTSD). In the DSM, psychotic symptoms are included in the definition for re-experiencing symptoms, i. e., sudden acting or feeling as if the trauma was recurring. These symptoms may include illusions, hallucinations, and dissociative flashback episodes. These symptoms do not occur exclusively during dissociative flashback episodes and are often chronic in nature. If delusions do occur, they are primarily paranoid or persecutory in nature.