Intermittent explosive disorder (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.).
A 2006 study suggests that the disorder is considerably more prevalent than previously thought. In a study of almost 10,000 individuals 18 years or older, lifetime episodes were reported at 7.3%, while 12-month occurrences were reported at 3.9%. This suggests a mean lifetime occurrence of 43 instances, with an average of $1359 in property damage.
A 2005 study conducted in the U.S. State of Rhode Island found the prevalence to be 6.3% (SE, +/- 0.7%) for lifetime DSM-IV IED in a study of 1300 patients under psychiatric evaluation. Prevalence is higher in men than in women. The disorder itself is not easily characterized and often exhibits comorbidity with other mood disorders, particularly bipolar disorder. Individuals diagnosed with IED report their outbursts were brief (lasting less than an hour), with a variety of bodily symptoms (sweating, chest tightness, twitching, palpitations) reported by a third of one sample. The violent acts were frequently reported accompanied by a sensation of relief, and in some cases, pleasure, but accompanied by remorse after the fact.
Read more about Intermittent Explosive Disorder: Diagnosis, Treatment
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