What Are Psychological Intrusions? | Squamish Trauma Therapy
Have you ever had a thought pop into your head that felt nothing like you? Or noticed a wave of anger, sadness, or fear that seemed to arrive from nowhere, with no clear reason attached to it? Maybe you've caught yourself saying something and thought, "that didn't even sound like me", or perhaps felt so enraged that it didn't feel like it belonged to you.
These moments have a name in trauma and dissociation research: psychological intrusions. They're far more common than most people realize, and understanding them can bring enormous relief. Once you know what's happening, the experience usually stops feeling so frightening or shameful, and instead can become an opportunity for greater curiosity towards the intrusive part.
A psychological intrusion is a thought, feeling, urge, sensation, or action that surfaces suddenly and feels disconnected from your usual sense of self. Through a dissociative lens, intrusions are understood as separated pieces of overwhelming past experience resurfacing on their own, rather than signs that something is wrong with you.
What Is a Psychological Intrusion?
A psychological intrusion is any thought, feeling, sensation, impulse, or even action that shows up uninvited and feels somehow separate from your usual sense of self. It's not the same as ordinary distraction or a passing worry. It has a distinct quality of not belonging to me, even though it clearly came from inside you.
Researchers who study dissociation, including psychologist Paul Dell, have found that these intrusions can touch nearly every part of human experience: thoughts, emotions, urges, memory, even the sense of who is in control of your body. What they share is a single underlying pattern. Something that should feel integrated into "me" instead feels like it's crashing in from somewhere else.
What Do Psychological Intrusions Feel Like?
Intrusions show up in many forms, and most people only ever notice a few of them. Some common examples include:
Intrusive thoughts that feel foreign, harsh, or completely out of step with how you normally think
"Made" feelings, where an emotion arrives suddenly and intensely, without a matching thought or event to explain it
"Made" impulses or urges, where you feel pulled to do or say something that doesn't fit your values or intentions
Internal voices or an internal dialogue, sometimes experienced as arguing, commenting, or offering a running commentary
Self-alteration, the disorienting sense that your body, thoughts, or actions momentarily belong to someone else
Losing access to a skill or piece of knowledge you normally have, only to have it return later
If any of these sound familiar, please hear this clearly: experiencing intrusions does not mean something is broken in you. It means your nervous system learned, at some point, to separate overwhelming material into pieces that could be managed one at a time rather than all at once.
Why Do Psychological Intrusions Happen?
Intrusions are almost always rooted in adaptive separation. When an experience is too much to process in the moment, whether that's a single frightening event or years of ongoing stress, the mind can wall off pieces of it. Emotions get stored away from thoughts. Memories get stored away from the body's sensations. A reaction that made complete sense at age seven can keep surfacing decades later, disconnected from its original context, because it was never fully integrated into the ongoing story of "me."
This is where a gentle, parts-based way of thinking becomes useful. You don't have to use clinical language to notice that different pieces of you sometimes hold different feelings, reactions, or beliefs. A part of you might carry fear from an old situation. Another part might carry anger that never had anywhere to go. When one of these parts surfaces unexpectedly, it can feel like an intrusion precisely because it hasn't yet been welcomed back into the whole of who you are.
Trauma researcher Judith Herman has described dissociation as the way overwhelming sensory and emotional material gets separated from ordinary memory and language. Bessel van der Kolk has written about how trauma can fracture experience into isolated fragments rather than a single coherent story. Both point to the same truth: intrusions are not random malfunctions. They are echoes of something your system once needed to survive.
How This Differs From "Everyday" Intrusive Thoughts
Most people have intrusive thoughts occasionally, a stray worry, an odd mental image, a passing "what if." What sets dissociative intrusions apart is the felt sense of foreignness and frequency. They tend to recur, to feel disconnected from your current emotional state, and to carry a quality of "this isn't me" rather than simply "this is unpleasant." If intrusions are frequent, distressing, or accompanied by lost time, it's worth exploring with a trauma-informed therapist rather than trying to reason your way past them alone.
Small Thing to Try This Week
Next time a thought, feeling, behaviour, or urge shows up that seems out of step with you, try pausing and asking silently:
"Which part of me is this coming from, and what might it be trying to protect me from?"
You don't need an answer right away. Simply asking the question, with curiosity instead of alarm, starts to build a bridge back to that part instead of pushing it further away. Psychological intrusions can be disorienting, but they make sense once you understand where they come from and the function they serve for your system. With the right support, it's possible to build a relationship with these parts of yourself instead of feeling ambushed by them. That's the work I do with clients in my Squamish practice: helping you understand your own internal world with compassion rather than fear.
Frequently Asked Questions; TLDR
Is a psychological intrusion the same as an intrusive thought? Not exactly. Intrusive thoughts are one type of psychological intrusion. The broader category also includes sudden feelings, urges, sensations, or even actions that feel disconnected from your usual sense of self.
Are psychological intrusions a sign of trauma? They can be. Dissociation researchers link intrusions to moments when an experience was too overwhelming to process fully at the time, so pieces of it got separated and can resurface later, often disconnected from their original context.
Are dissociative intrusions the same as psychosis? No. With dissociative intrusions, a person recognizes the thought, feeling, or voice as strange or foreign but does not build a delusional explanation around it. That distinction matters and is worth discussing with a trauma-informed therapist if you're unsure.
How do I know if I should talk to a therapist about this? If intrusions are frequent, distressing, or come with lost time or memory gaps, it's worth exploring with a trauma-informed therapist rather than managing it alone.
Reading Resources
What My Bones Know by Stephanie Foo
Complex PTSD: From Surviving to Thriving by Pete Walker
No Bad Parts by Richard Schwartz
The Body Keeps the Score by Bessel van der Kolk
You can find all of these titles, along with more books I recommend to clients, on my Amazon storefront HERE
Katharina Bleinis is a Registered Clinical Counsellor based in Squamish, BC, holding a Master's in Counselling Psychology. Her practice is trauma-informed, drawing on Parts-Informed therapy, Sensorimotor Psychotherapy, and the structural dissociation theory to help clients understand and work with the parts of themselves shaped by difficult experiences. Katharina works with clients navigating complex trauma, dissociation, and the lasting effects of adverse childhood experiences, with a warm, collaborative approach grounded in both research and lived clinical experience
If any of this resonates with you, it might be worth exploring further together.
Understanding your parts is often the first step toward feeling more whole.