Explainers · 08
The window of tolerance
Your window of tolerance is the range of arousal in which you can feel something and still think clearly. Above it you are in hyperarousal: panic, rage, racing thoughts. Below it you are in hypoarousal: numb, flat, shut down. Neither state is a character failure, and neither responds to reasoning. Trauma narrows the window; regulation skills and trauma treatment widen it again.
The three zones
Inside the window you can be upset and still reachable. You can hear another point of view, remember what you meant to say, and choose your response.
Above it, the body has decided there is a threat: heart rate up, thinking narrow and fast, the urge to fight or flee. Below it, the system has given up on escape: heavy, distant, flat, watching yourself from a step away.
Why arguing does not work there
Outside the window, the part of the brain that reasons is not in charge. This is why a partner saying calm down has never once worked, and why you can lose an hour to a conversation neither of you can later reconstruct.
The task is not to win the point. It is to get back inside the window first, and return to the conversation afterwards.
How to widen it
In the moment: longer out-breath than in, feet pressed into the floor, cold water on the wrists, naming out loud what is happening. For shutdown, movement and sensation rather than calm.
Over time, the window widens when the nervous system stops expecting the old threat. That is what trauma work addresses, and TRTP is a structured four-part process rather than open-ended therapy.
Questions
Who came up with the window of tolerance?+
The term comes from Dr Dan Siegel and is now standard in trauma-informed practice. It describes something people recognise immediately, which is part of why it has stuck.
Can you be in both states in one day?+
Yes, and many people swing between them. A morning of panic and an afternoon of numbness is a common pattern, and it usually means the window is narrow rather than that something new has gone wrong.
Does a narrow window mean I am traumatised?+
Not necessarily. Exhaustion, illness, grief and prolonged stress all narrow it temporarily. A window that has been narrow for years, with no obvious current cause, is worth looking at properly.
Related service
Trauma Counselling
Trauma resolution without reliving the detail. Where an event underneath is keeping the window narrow, TRTP resolves it directly.
Related explainers
- Hypervigilance, and why you cannot switch it off
- Resetting the vagus nerve
- What trauma bonding is, and how to break one
More in the explainers index, the how-to guides or the glossary.