Intermittent Explosive Disorder (IED)

What intermittent explosive disorder is

Intermittent explosive disorder, or IED, is a recognised mental health condition. Someone living with IED has repeated outbursts of anger or aggression, each far larger than whatever set it off.

The outbursts are impulsive rather than planned; they start fast and usually pass within a short time. Relief often comes first once the anger fades, then regret.

This is not a bad temper someone chooses, but a real difficulty controlling an aggressive impulse.

IED is a formal diagnosis, not an invented label. The World Health Organization lists it in the ICD-11, its international manual of diagnoses, under the code 6C73.³ It also appears in the DSM-5, the manual most clinicians use. There it is the only diagnosis defined by aggression itself.⁴

In the United States, about 2.7% of people meet the stricter definition in a given year.¹

An earlier manual, the DSM-IV, used a broader definition, and on that definition a large US survey put the lifetime figure at around 7.3%.² That higher figure counts milder patterns and rests on that one study.

IED was once thought to affect mostly men. Recent community surveys suggest the rates are similar across genders.³ Serious physical assault is still more common in men.

What it feels like, for the person and the family

Many people notice a build-up first, as tension and irritability rise, sometimes with a racing or tight physical feeling. The outburst then arrives fast, with little warning.

An episode usually lasts under 30 minutes,¹ and often follows a small trigger from someone close. In the moment, the anger can feel impossible to stop, and it may take the form of shouting, breaking things, or hitting out.

Many feel relief as the tension eases, and guilt, embarrassment, or shame often follow. Over time, that cycle can leave a person thinking less of themselves.

For the people around them

Family and close friends are under strain too. Many describe watching every word at home, never quite sure what will set off the next episode.

That uncertainty is exhausting: some families avoid seeing other people, fearing a public outburst, and some worry quietly about their own safety. Support matters for the whole household, not only for the person with IED.

How it is diagnosed

A qualified professional makes the diagnosis, not an online quiz. People who know the person well are sometimes asked to add detail. The DSM-5 describes two patterns of aggression, and only one is needed.

Several other things must also be true. The outburst is a failure to control an aggressive impulse.¹ It follows a provocation that would not normally cause such a reaction. The aggression is impulsive or anger-based, rather than planned.

It causes real distress, or it harms relationships, work, or daily life. The diagnosis is not given to a child under 6.¹ It is also not given when another condition, a medical problem, or a substance better explains the outbursts.

The ICD-11 describes IED in the same way, as impulsive aggression the person struggles to control.³

Is it just a bad temper, or something else?

Everyday anger is a normal feeling that usually fits the situation, can be controlled, and does not leave lasting harm. IED is different: the reaction is out of proportion, and it causes distress or damage.

One difference matters more than the rest. In IED the aggression is impulsive, not planned or premeditated.⁵ That is what separates it from the conditions it is often confused with.

A head injury, a brain condition, or dementia can cause aggression.³ A clinician rules these out before diagnosing IED.

Why it happens

The outbursts are not a choice to be cruel, and they reflect difficulty in the systems that control anger and impulse.

Brain research points to serotonin, a chemical messenger involved in impulse control. People living with IED show signs of lower serotonin activity¹ in the brain areas that help control anger.

The amygdala is a small structure deep in the brain that responds to threat. In people with IED, it reacts more strongly to angry cues.¹ That is part of why a small trigger can bring such a large response.

IED also tends to run in families. Twin studies suggest a substantial genetic influence on impulsive aggression.¹ Childhood trauma matters too: physical or emotional harm in the early years raises the risk.

One finding matters for treatment: IED is not one single condition. Some cases resemble epilepsy-like brain activity, some look more like a mood problem, and others have different causes again.⁷ Assessment and treatment are therefore matched to the person.

How it is treated

IED can be treated, and early help makes a real difference. The research base is still growing, care is matched to the person, and there is no one approach that fits everybody.

Talking therapy is the main treatment. Among talking therapies, IED tends to respond better to cognitive behavioural therapy and structured anger-management work than to open-ended, insight-based approaches.⁸

Cognitive behavioural therapy works on the link between thoughts, feelings and actions. People learn to spot the early signs of an outburst. They practise relaxing the body under stress, responding more calmly, and solving the problems that keep causing conflict.⁸

Medication is sometimes part of treatment, and that is a decision for a prescriber. A range of medicines has been studied for IED. They include serotonin-acting antidepressants called SSRIs, mood stabilisers, and anti-seizure medicines.⁷

Because IED is not one single condition, no single medicine suits everyone. A prescriber considers the person's full history before suggesting an approach.

Living with IED

IED often starts in late childhood or the teenage years.¹ On average, that is around age 14.² For many people it is a long-term condition, though it is less common in older adults.

Other conditions often occur alongside IED. Depression, anxiety, and substance-use problems are common, and they often begin later.¹ Treating them together usually works better than treating one alone.

Day to day, steady habits help. Notice the early signs of tension, and step away before a situation escalates. Keep up with therapy, and stay in contact with people who understand.

Learning about IED together can ease the strain. Family therapy sometimes helps rebuild trust.

Safety and finding help

Outbursts can lead to real harm. That includes injury to the person, to others, or to property. The risk is not only to others: in a clinical study of 376 people with the diagnosis, 12.5% had attempted suicide and 7.4% had injured themselves without suicidal intent.⁹¹ Safety comes first, for everyone in the home.

If you or someone else is in immediate danger, treat it as an emergency. Use the crisis numbers at the top of this page. There is no shame in asking for urgent help.

A simple plan helps between episodes. Learn to notice the build-up, agree in advance how to step out of an argument, and know who to call when things feel unsafe.

A qualified mental-health professional can assess what is happening. You can find a therapist through TherapyRoute when you feel ready.

This article is for general information and is not a substitute for professional advice, diagnosis, or treatment. If you think you or someone you know may be living with intermittent explosive disorder, please speak to a qualified mental-health professional. This page was written and reviewed by the TherapyRoute clinical team.

References

1. [1] DSM-5 (APA 2013), Disruptive, Impulse-Control, and Conduct Disorders (pt 1).
2. [2] Kessler, R. C., Coccaro, E. F., Fava, M., Jaeger, S., Jin, R., & Walters, E. (2006). The prevalence and correlates of DSM-IV intermittent explosive disorder in the National Comorbidity Survey Replication. Archives of General Psychiatry, 63(6), 669-678. pmc.ncbi.nlm.nih.gov/articles/PMC1924721.
3. [3] WHO - Clinical Descriptions and Diagnostic Requirements for ICD-11 (CDDR, 2024), 6C73 Intermittent explosive disorder.
4. [4] Kaplan & Sadock's Comprehensive Textbook of Psychiatry, 10th ed (2017, vols 1+2), 30. The Neuropsychiatry of Human Aggression (pt 8).
5. [5] DSM-5 (APA 2013), Disruptive, Impulse-Control, and Conduct Disorders (pt 2).
6. [6] WHO - Clinical Descriptions and Diagnostic Requirements for ICD-11 (CDDR, 2024), 6C91 Conduct-dissocial disorder.
7. [7] Kaplan & Sadock's Comprehensive Textbook of Psychiatry, 10th ed (2017, vols 1+2), 30. The Neuropsychiatry of Human Aggression (pt 10).
8. [8] Gabbard's Treatments of Psychiatric Disorders (2007), Print: Chapter 57. Impulse-Control Disorders (pt 1).
9. [9] McCloskey, M. S., Ben-Zeev, D., Lee, R., & Coccaro, E. F. (2008). Prevalence of suicidal and self-injurious behavior among subjects with intermittent explosive disorder. Psychiatry Research, 158(2), 248–250. https://doi.org/10.1016/j.psychres.2007.09.011