Do you often find yourself overreacting to “small things” or shutting down when you feel overwhelmed? If you’ve ever felt like your emotions take over or you close up when you’re stressed, you aren’t alone. This experience has a name, and when it occurs we call it operating outside of your Window of Tolerance.
The Window of Tolerance is a concept developed by Dr. Dan Siegal, a Psychiatrist and Academic, which is now a foundational theory used in trauma-informed therapy. Our Window of Tolerance helps us understand our emotional range and how we can function within these ranges to feel safe, present, and connected. We can manage and engage with the world when we are within our window, but when we are outside of it, we often experience over-reactivity, emotional instability, or just shut down all together.
Lets dive into greater detail about what the window of tolerance is, signs you might be outside of your window, and discuss ways that therapy and other strategies can help you to expand your window of tolerance.
What Is A Window of tolerance?
The Window of Tolerance is like our personal comfort zone where you feel capable of managing daily life with ease and can function effectively. When you’re inside this zone, you’ll notice you’re able to think clearly, respond rather than react, and feel emotionally balanced. It helps you feel grounded and make choices confidently, even when life gets stressful.
When we are within our window of tolerance, we can:
- Face challenges with logic and reason
- Feel grounded and calm
- Feel open and connected
- Experience our emotions without feeling overwhelmed by them
- Ground ourselves and regulate our own emotions when things go wrong
Being within our window doesn’t mean we never get angry or upset, it simply means that we are able to experience these feelings without them consuming our thoughts and actions. But what happens when we leave that window?
Hyperarousal: Fight, Flight, and Feeling out of Control
When a stressful situation pushes us above our window of tolerance, we enter a state known as hyperarousal. This is often associated with our “fight or flight” response, a term coined by physiologist Walter Bradford Cannon who used this to describe our body’s survival reaction that is hardwired into our nervous system.
This is when the nervous system goes into overdrive. Common signs include:
- Anxiety or panic
- Irritability, anger, or rage
- Racing thoughts
- Hypervigilance or always feeling “on guard”
- Restlessness or difficulty sleeping
- Feeling out of control
While we are in this state, stress hormones such as cortisol and adrenaline flood our brains. Our systems are on high alert, scanning for danger, even if the threat is emotional rather than physical.
Hypoarousal: Freezing, Shutting Down, and Numbness
On the other end of the spectrum, we have hypoarousal. This happens when we drop below or Window of Tolerance. This is known as the “freeze” response, where experiences of numbness, dissociation, or feeling emotionally “flat” can occur.
This is when our nervous system shuts down. Common signs include:
- Detachment or numbness
- Feeling foggy or spaced out
- Lack of motivation
- Depression
- Low energy or fatigue
- Feeling disconnected from self or others
- Difficulty speaking and thinking clearly
When we are in this state, everything slows down, freezes, or stops completely.
While hyperarousal feels like the gas pedal is slammed down, hypoarousal feels like the brakes are slammed. Both of these states hinder your ability to think clearly, connect with others, or respond effectively. These are survival responses for people who typically have histories of trauma, neglect, or chronic stress.
Trauma and window of tolerance
If you have a history of trauma, you may have a narrow Window of Tolerance. This means you may become dysregulated more easily and may find it challenging to stay within your window when you face a stressful or triggering situation.
Why does this happen?
Trauma changes our nervous system. It reduces our ability to control our emotions and makes us more sensitive to perceived threats. For those who have experienced persistent and overwhelming stress or traumatic experiences, especially in childhood, the nervous system defaults to one of these reactions quickly and frequently.
Some experiences that narrow our window of tolerance can include:
- Abuse or neglect in childhood
- Domestic violence
- Chronic illness or pain
- Sexual assault
- Grief or loss
- Poverty or unsafe living conditions
- Identity-based discrimination or marginalization
But there is good news. Your size of Window of Tolerance isn’t permanent. With practice, support, and therapy, it can expand!
Therapy and the window of tolerance
One of the core goals of trauma therapy for clients who have a limited window of tolerance is to help identify when they are outside of this window and to learn tools to get back in. We offer various types of therapy, such as EMDR, to help support clients through this journey. Over time, therapy helps us to widen our window, so we have more capacity to deal with life stressors without becoming overwhelmed.
Therapy supports this process in various ways:
- Psychoeducation: Therapists help you understand your emotional states and recognize your unique triggers. They help you put a name for these experiences and equip you with the language to describe what is happening. This allows for an increase in agency and can reduce feelings of shame and stigma.
- Building a Safe Space: Your relationship with your therapist is a place where you can explore difficult emotions safely and free of judgment. Your therapist is there to support you to make your healing journey feel safer and more manageable.
- Mind-Body Connection: In therapy, you’ll learn strategies to help you soothe your nervous system when stressful moments happen. Techniques like mindfulness, breathing exercises, grounding, and physical activity all help to return to our window when we feel dysregulated.
- Processing Trauma: With time, commitment, and care, therapy helps to safely process trauma and let go of stored survival responses. This helps to prevent old wounds from re-opening and hijacking our present moments.
- Rewiring Our Nervous System: Through practice and co-regulation, your therapist will help your brain and body learn safe ways to feel your emotions, connect with others, and stay within your window.
Everyday Tips to Help You Stay Within Your Window
Final Words
Whether you are in therapy or not, there are manageable and accessible ways to support your nervous system daily. The Centre for Addictions and Mental Health provides various tips to help you manage stress in the moment. The more you practice these strategies, the more your window will grow!
- Grounding techniques
- Use your 5 senses to bring yourself back to the present moment.
- Breathwork
- Try calming techniques such as deep belly breathing or box breathing
- Movement
- Use gentle movement like walking, stretching, or yoga to release stress
- Use more vigorous movement like running or dancing to release pent up energy
- Temperature Shifts
- Try splashing cold water on your face or holding an ice cube
- Use a warm blanket or make a hot drink when you feel like you are in a state of hypoarousal
These tips are just a steppingstone to a more balanced emotional state. Setting healthy boundaries, limiting exposure to triggers, and maintaining a routine that includes rest and downtime are essential for self-care and emotional well-being. Connecting with safe and supportive people in your life is equally important, co-regulation through calm, trusted relationships can help you feel grounded. Always remember you can reach out to a friend, therapist, or loved one when you need support.


