Why the pendulum swing?
Part of Nervous System Dysregulation cluster.
Short Answer
Swinging between hyperarousal (overwhelm) and hypoarousal (numbness) indicates a narrow window of tolerance, common in trauma survivors. Your nervous system oscillates between fight/flight activation and protective shutdown.
What This Means
You swing between two states: overwhelmed—heart racing, thoughts spinning, can't sleep, everything feels urgent, emotionally flooded—and numb—nothing feels real, disconnected from your body, no motivation, emotions locked away, time passes strangely. These aren't different problems. They are the same system on opposite ends of a spectrum. Overwhelmed is too much activation. Numb is too little. And here's the trap: overwhelm eventually exhausts your system, pushing you into shutdown. Shutdown eventually becomes suffocating, pushing you back into activation. You pendulum between states, never resting in the middle, never feeling truly okay.
Why This Happens
This oscillation reflects a nervous system calibrated for survival in unpredictable environments. When early caregivers were inconsistent—sometimes safe, sometimes threatening—your system developed both hypervigilance (to detect danger) and shutdown (to survive when escape wasn't possible). The swing happens because neither state is sustainable. Hyperarousal burns energy until collapse. Hypoarousal protects but creates such disconnection that the system eventually demands re-engagement. Your window of tolerance—the middle ground where you can feel without being flooded—is narrow because trauma taught your system that safety is temporary and threat is constant.
What Can Help
- Track the cycle: Notice what triggers the swing into overwhelm. Notice what triggers the collapse into numbness. Patterns reveal entry points for intervention.
- Interrupt the escalation: When you notice overwhelm building, use grounding techniques before collapse. Cold water, deep pressure, slow breathing, physical movement.
- Practice containment: When numb, engage your senses gently—warm water, pleasant scents, soft textures—to invite the system back without forcing.
- Regulate in both directions: From overwhelm: calming practices. From numb: gentle activation (short walk, music, calling a friend).
- Notice the middle: Even brief moments of regulation are worth noting. "I felt okay for 10 minutes after lunch." This builds neural pathways for the middle ground.
When to Seek Support
If the oscillation between overwhelm and numbness is interfering with work, relationships, or daily functioning—or if you're using substances, self-harm, or other strategies to manage the intensity—seek trauma-informed therapy. Somatic Experiencing, Sensorimotor Psychotherapy, or EMDR can help stabilize this pattern.
If You Need Support
If you are struggling, you are not alone. Please reach out:
- Call or text 988 (US) — Suicide & Crisis Lifeline
- Text 741741 (US) — Crisis Text Line
- UK: 116 123 (Samaritans)
- AU: 13 11 14 (Lifeline)
- Emergency: Call your local emergency number or go to the nearest emergency room
This page is for educational purposes only and is not a substitute for professional mental health care.
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Research References
This content draws from peer-reviewed research and established clinical frameworks.
Primary Research
- Felitti, V.J. et al. (1998). Relationship of childhood abuse and household dysfunction to many of the leading causes of death in adults: The ACE Study. Am J Prev Med, 14(4), 245-258. [Link]
- Porges, S.W. (2001). The polyvagal theory: phylogenetic substrates of a social nervous system. Int J Psychophysiol, 42(2), 123-146. [Link]
- Bremner, J.D. (2006). Traumatic stress: effects on the brain. Dialogues Clin Neurosci, 8(4), 445-461. [Link]
- Payne, P., Levine, P.A. & Crane-Godreau, M.A. (2015). Somatic experiencing: using interoception and proprioception as core elements of trauma therapy. Front Psychol, 6, 93. [Link]
- Van der Kolk, B.A. & Fisler, R. (1995). Dissociation and the fragmentary nature of traumatic memories. J Trauma Stress, 8(4), 505-525. [Link]
