"I'm so dysregulated. What can I do?" (Part One)
LAST UPDATED: APRIL 2026
What is the Window of Tolerance and how does it explain dysregulation?
The Window of Tolerance is a term and concept coined by the esteemed psychiatrist Daniel J. Siegel, MD – clinical professor of psychiatry at the UCLA School of Medicine and executive director of the Mindsight Institute – that describes the optimal emotional “zone” our brains can exist in, to function best and thrive in everyday life.
On either side of the “optimal zone,” there are two other zones – the hyper-arousal zone and the hypo-arousal zone, each characterized by its own attributes.
What does it feel like when you’re in your optimal arousal zone?
The optimal zone – is characterized by a sense of groundedness, flexibility, openness, curiosity, presence, an ability to be emotionally regulated, and a capacity to tolerate life’s stressors.
It feels good, we feel good, and we feel more equipped to “adult and human.”
However, if this Window of Tolerance is eclipsed, if you experience internal or external stressors that cause you to move beyond and outside of your Window of Tolerance, you may find yourself existing in either a hyper-aroused or hypo-aroused state.
What is the hyperarousal zone and what does it feel like in your body?
Hyperarousal is an emotional state characterized by high energy, anger, panic, irritability, anxiety, hypervigilance, overwhelm, chaos, fight or flight instincts, and startle response (to name but a few characteristics).
Being in a hyperaroused state can cause us to react impulsively and with increased aggression or fear.
This state often leads to reduced rational thinking and difficulty in processing information calmly.
Additionally, when we’re in a hyperaroused state, we may find it challenging to focus on tasks, as our heightened alertness can make us easily distracted and overwhelmed.
(And full disclosure, this is where I’m most prone to going if outside the optimal arousal zone; I know this landscape well.)
What is the hypoarousal zone and why do trauma survivors spend so much time there?
By contrast, the hypoarousal zone is an emotional state characterized by shutting down, numbness, depressiveness, withdrawal, shame, flat affect, and disconnection (to name but a few characteristics).
Being in a hypoaroused state typically involves a noticeable decrease in physiological and mental activity.
Someone in this state may display signs such as slowed movements, reduced muscle tone, and a lack of responsiveness to their environment.
Their heart rate and breathing may become slow and shallow, and they might have a vacant or distant expression.
Mentally, individuals in a hypoaroused state may appear lethargic, disengaged, and have difficulty concentrating or staying alert.
This state can often be associated with feelings of fatigue, depression, or even dissociation from reality.
So clearly, the ideal is to exist in the optimal arousal zone versus being hyper- or hypoaroused. But how do we do this?
How Do We Stay In The Optimal Arousal Zone More?
How do we stay in the optimal arousal zone and increase our window of tolerance?
Related reading: Attachment Trauma: How Early Relationships Shape Your Adult Connections
Look, this is ideally where we want to be.
But, I’d be remiss if I didn’t mention that all of us – at every age from the moment we’re born to the moment we die – eclipse our Window of Tolerance and find ourselves in a non-ideal emotional regulation zone sometimes.
That’s normal, and that’s natural.
So the goal here is not that we never eclipse our Window of Tolerance – I personally and professionally think that that’s unrealistic.
Rather, the goal is to increase our Window of Tolerance and to grow our capacity to “rebound and be resilient” — coming back to the Window of Tolerance quickly and effectively when we find ourselves outside of it.
So again, how do we increase our Window of Tolerance?
In my personal and professional experience, this work is two-fold:
First, we provide ourselves with the foundational biopsychosocial elements that contribute to a healthy, regulated nervous system. This is what we’ll explore next in this essay.
And two, we work to cultivate and call upon a wide toolbox of tools when we find ourselves outside of our Window of Tolerance (which, again, is inevitable). We’ll explore this more in two weeks.
