TraumaFor everyone40 min read

Understanding trauma and the window of tolerance

What the body and memory do after a shock, explained clearly. The window of tolerance as a practical map, what closes it, what widens it — and the treatments whose efficacy is established.

Reviewed on October 4, 2026
Dr Zayan Al-Falasi, psychiatrist

In short

This programme is for someone who has been through a traumatic event, recent or long past, and for the people close to them. It explains what the body does, why memories behave differently, and how to steady yourself day to day. It also says plainly what can be treated and with what — because established trauma can be treated well, and not with just anything.

Topic: Trauma
Who it's for: For everyone
Languages: FR · EN · DE · IT · ES · ZH · AR

Français · English · Deutsch · Italiano · Español · 中文 · العربية

The programme

This guide is psychoeducational content. It does not replace a consultation. If you have suicidal thoughts, if you are hurting yourself, if you are currently in danger (ongoing violence, a situation you cannot leave), the priority is not to understand: today, contact the emergency services in your country, a suicide prevention line or someone who can get you to safety. This guide is not a trauma treatment, and at no point will it ask you to recount or revisit what happened to you. If reading becomes too difficult, stop: that is information, not failure. Allow forty minutes to read.

The notice at the start of the resources is hidden.

1. Before you start

A noise in the street, and you are on your feet before you have understood. You avoid a road, an area, a smell, without always knowing why. You sleep badly, you startle, you are short with people who have done nothing. Or the reverse: you are far away, cottony, watching yourself act, and people find you calm when you are nowhere at all.

And you have been told it is over, that you should move on, that others have been through worse.

Three things, right away.

What you are describing is not a character flaw, it is a survival system that stayed switched on. It worked exactly as designed at the moment it was needed; it simply has not switched off since.

Most people get better, and a disorder that sets in can be treated. In the weeks after a traumatic event, almost everyone has symptoms, and most people recover without treatment. When the difficulties last, there are psychotherapies whose effectiveness is established, including for events long past.

This guide helps you get your bearings and hold on, not relive what happened. It offers tools to recognise which state you are in and to come back to the present when you drift out of it. Work on the memory itself is done with a trained professional, for reasons explained in section 14.

2. The window of tolerance, in two minutes

This is the central idea of the text, and it gives you a map you can use today.

Your window of tolerance is the band of arousal in which you can both feel and think: awake enough to be present, calm enough to reflect. Above it, you are on alert and reasoning drops out. Below it, you are switched off and nothing reaches you.

Three zones, then.

Above: hyperarousal. Fast heart, tense muscles, hypervigilance, startling, anger that rises quickly, racing thoughts, unable to stay still or sleep. This is survival in "something must be done" mode.

Inside the window. You feel things, including unpleasant ones, and you remain able to think, speak and choose. That is where everything happens: conversations, work, relationships, and treatment itself.

Below: hypoarousal. Numbness, emptiness, slowness, the sense of being far away or behind glass, a heavy body, difficulty speaking, the impression of feeling nothing. This is survival in "there is nothing to be done" mode.

After a trauma, two things change. The window narrows: it takes far less to leave it than before. And you leave it by unpredictable routes, triggered by details with no apparent connection to danger.

An example

Karim was in a car accident, and he still drives every day. A lorry pulls across a little fast, and within three seconds his palms are damp, his breath is short, and he has the sense that it is about to happen again: he has left through the top. In the evening, at home, a discussion gets slightly heated, and he finds himself absent, answering in monosyllables, unable to say what he feels: he has left through the bottom.

Nothing he did was a choice. And none of it is corrected by reasoning: you do not argue your way back into your window, you use the body and the environment. That is the subject of sections 10 and 11.

Two honest warnings

The window of tolerance is a map, not a scientific discovery. It is a clinical model, widely used in practice because it helps people recognise their state and choose what to do. It does not have the same experimental footing as the treatments described in section 14. Use it as a spotting tool: that is what it is good for.

Widening your window is not the treatment of trauma. It is what makes treatment possible, and what makes life bearable in the meantime. The two do not replace each other.

The rest is for members

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What the rest contains

3. What trauma is, and what it is not
4. What the body does: the defence responses
5. Why traumatic memory is different
6. What happens afterwards: most people get better
7. The established disorder, and repeated trauma
8. Spotting your three zones
9. Your triggers
10. Coming down: leaving hyperarousal
11. Coming up: leaving hypoarousal
12. Widening the window
13. Daily life: sleep, body, substances, people
14. What works: trauma-focused therapies
15. Medication
16. What does not work, and what can harm
17. When and how to consult
18. If you are supporting someone
19. Some particular situations
20. Post-traumatic growth: what can be said
21. What you can expect
22. Frequently asked questions
23. Key points
24. Sources and foundations

Frequently asked questions

Why didn't I react differently? Because the response was selected automatically, according to the balance of force assessed by a very fast circuit. Freezing and tonic immobility are not choices. See section 4: that is the section to reread when the guilt comes back.

It happened twenty years ago, is it too late? No. Trauma-focused therapies are effective for old events as for recent ones. Age of the event is not an exclusion criterion.

Why is it coming back now, years later? Difficulties sometimes appear, or get worse, long after the event, at a time of new stress, around an anniversary or with a change in life. A review of the studies showed that a disorder that emerges late, with no sign at all beforehand, is rare: most often, milder symptoms were already there, and something reawakened them. This return does not mean you have failed to move on, and it is treated like the rest.

I don't remember everything. Can I still be treated? Yes. Treatment does not require a complete account, and it does not try to reconstruct what is missing.

Will I have to relive it? You will work on the memory with a frame, a pace and someone beside you. That is not the same as reliving it alone, at night, without warning — which is precisely what is happening now.

What if my event isn't "serious enough"? That is not yours to judge, and objective severity predicts consequences poorly. If you recognise yourself in sections 2, 5 and 7, go and consult and let the professional assess.

Can I do this work alone with exercises? Sections 8 to 13 can be done alone and are useful. Trauma treatment cannot: it requires a trained professional. That is not a question of courage, it is a question of safety and effectiveness.

Can online therapy be enough? For some people, yes. CBT programmes followed over the internet reduce symptoms, especially when they focus on the trauma and a therapist supports the process, even though the studies remain less solid than for face-to-face therapy. The British guidelines suggest considering them, with support from a trained professional, for adults who prefer them, when the event happened more than three months ago, when the symptoms, particularly dissociative ones, are not severe, and when there is no risk of harm to oneself or to others.

A complaint is under way, or I have to testify: should I wait until the proceedings are over before getting treatment? No. The British guidelines ask that treatment not be delayed or refused solely because of legal proceedings or a compensation claim. Let your lawyer and your therapist know: the rules differ from one country to another, and both can tell you how to organise your care during the proceedings.

Will it come back? Reminders can reappear with stress or an anniversary. After successful treatment they are shorter, less intense, and they no longer close the window in the same way.

Someone close to me refuses to see a professional. What can I do? You cannot consult in their place, and pressing them with questions risks making them close off even more. Say what you observe, without making a diagnosis: "you've been sleeping very badly since the accident, and I can see you're avoiding the car". Offer specific help, such as looking with them for a professional trained in trauma or going with them to the first appointment, then leave the door open. If they talk about dying or if you fear for their life, do not wait: in immediate danger, call the emergency services in your country and do not leave them alone; otherwise, contact a suicide prevention line or a doctor the same day. Our guide When someone close talks about dying: ask, make safe, stay explains how to ask the question and what to do next. Seek help for yourself as well.

Printable worksheets

The exercises from this programme, as printable PDFs. Members only.

See the plansThe printable worksheets are included with access.

01Safety firstBefore anything else: am I safe today?
02Spotting my three zonesOne week without changing anything. Translating the map into my own signs.
03My triggersTwo weeks. Spotting, not confronting.
04Coming downAbove the window, reasoning with yourself does not work: you go through the body and your surroundings.
05Coming back upBelow the window, you need the opposite: add stimulation.
06Widening the window, day to dayNothing dramatic: routine, sleep, substances, other people, dates.
07Getting help, and a page for the people close to meWhat really moves the limits is treatment.

Every worksheet in one file, with a table of contents.

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