Intermittent explosive disorder (abbreviated IED) is a behavioral disorder characterized by extreme expressions of anger, often to the point of uncontrollable rage, that are disproportionate to the situation at hand. It is currently categorized in the Diagnostic and Statistical Manual of Mental Disorders as an impulse control disorder. IED belongs to the larger family of Axis I impulse control disorders listed in the DSM-IV-TR, along with kleptomania, pyromania, pathological gambling, and others. Impulsive aggression is unpremeditated, and is defined by a disproportionate reaction to any provocation, real or perceived. Some individuals have reported affective changes prior to an outburst (e.g.,tension, mood changes, energy changes, etc.).