Short Answer
Therapy creates safety and focuses attention inward—exactly the conditions that allow dissociated material to surface. When you feel heard but not judged, your nervous system lowers defenses that previously kept trauma memories compartmentalized. Dissociation in session indicates you're accessing material your brain has kept sealed off. It's not regression; it's progress, though it feels destabilizing.
What This Means
Dissociation in therapy can feel like: spacing out while talking, losing chunks of time, feeling unreal or watching yourself from outside, sudden inability to speak, body numbness, or shaking without emotional content. It's disorienting because you're present but not fully there—you can hear the therapist but respond feels impossible.
This happens because therapy creates a paradox: you're safe enough to remember, but the memories themselves feel dangerous. Your brain oscillates between engagement and shutdown. The dissociative episode is your system trying to manage high activation—too much feeling threatens overwhelm, so you check out.
What's crucial: this isn't therapy harming you; it's therapy working. Symptoms emerging in a safe container means your system trusts the environment enough to let material surface. A skilled trauma therapist expects this and has containment tools—grounding, titration, resourcing—to help you stay within the window of tolerance.
Why This Happens
Neurobiologically, dissociation is a hypoarousal response—drop below the fight-flight activation into freeze/shutdown. The parasympathetic system's dorsal vagal pathway engages, causing collapse, numbness, and disconnection. This happens when the sympathetic arousal (anxiety, panic) becomes too intense and the body opts for emergency shutdown.
Therapy triggers this by accessing traumatic memory networks through talking, imagery, or somatic awareness. These networks were stored under conditions of high stress—unprocessed memories remain in implicit, sensory form rather than narrative memory. When activated, they trigger the same neurological emergency responses they were encoded with.
What Can Help
- Grounding techniques: Cold water on wrists, feet on floor, counting colors in the room—reconnect to present
- Titration: Working with tiny pieces of memory rather than full immersion—your therapist should pace this
- Resourcing: Building internal capacities (safe place imagery, wise figures, somatic anchors) before trauma work
- Somatic awareness: Noticing body sensations as early warning—dissociation often has precursors (vision narrowing, time slowing)
- Eye contact: Briefly looking at the therapist—visual connection can interrupt dissociative downward spiral
- Movement: Small physical movements (toes wiggling) keeps body online while processing
- Tell your therapist: Naming "I'm dissociating" brings it into awareness and helps the therapist guide you back
When to Seek Support
Dissociation in therapy is expected in trauma treatment but requires skilled containment. If you're dissociating frequently outside sessions or losing significant time, you may have a dissociative disorder requiring specialized care. A trauma therapist trained in dissociation (not just PTSD) can assess whether your dissociation is trauma-related or part of a more complex presentation. Don't attempt deep trauma work without a therapist who can manage dissociative responses.
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Robert Greene
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Research References
Van der Kolk, B. (2014). The Body Keeps the Score. Viking. PubMed
Porges, S.W. (2011). The Polyvagal Theory. Norton. Google Scholar
Felitti, V.J. et al. (1998). Adverse Childhood Experiences. CDC ACE Study
American Psychological Association. (2023). Trauma
National Institute of Mental Health. (2023). PTSD