Have you ever been completely fine one moment, and then suddenly overwhelmed, shut down, or on edge the next, without fully understanding why? You're not overreacting, and you're not "too sensitive." What you're experiencing has a name: it's about your window of tolerance, and understanding it can change the way you relate to your own emotions. What Is the Window of Tolerance? The window of tolerance is the zone in which your nervous system feels regulated — where you can thi