That strange sense that your life isn’t quite real, that the world around you feels like a stage set or a video game, is surprisingly common. It has roots in how your brain processes stress, identity, and perception. While the philosophical idea of a simulated universe gets a lot of attention, the feeling itself is almost always a neurological and psychological experience with well-understood causes.
Your Brain Has a Built-In “Unreality” Mode
What you’re describing has a clinical name: derealization. It’s the experience of feeling detached from your surroundings, as if things and people in the world around you aren’t real. Its close cousin, depersonalization, is the feeling of being detached from your own mind, self, or body, like you’re watching your life from outside yourself. Most people experience one or both of these at some point. Brief, passing episodes are so normal they have their own term: transient depersonalization.
These sensations exist because your brain has a kind of dimmer switch for how intensely you experience reality. Under certain conditions, it dials down your emotional connection to the world around you. This isn’t a malfunction. It’s a protective mechanism, the same way your body goes numb after a physical injury. The problem is that it can activate when you don’t need it, or stay on longer than it should.
Stress and Trauma Are the Most Common Triggers
The single biggest driver of simulation-like feelings is your nervous system’s stress response. When your brain detects a threat, it can trigger what’s known as a freeze response: instead of fighting or fleeing, you go still, foggy, and disconnected, as if the situation isn’t real. For many people, this response doesn’t just happen during a single scary event. It becomes a background state.
This pattern is sometimes called functional freeze. Someone in functional freeze appears relatively normal from the outside. They go to work, handle responsibilities, and maintain routines. But internally, they’re running on autopilot without being fully present. The signs include feeling disconnected from reality, persistent brain fog, difficulty concentrating, emotional numbness, and exhaustion that sleep doesn’t fix. If your days feel like you’re just going through the motions, watching yourself perform tasks without really being “in” them, this is likely what’s happening.
You don’t need a dramatic traumatic event to end up here. Chronic stress, prolonged uncertainty, emotional neglect, burnout, or even a long period of isolation can push your nervous system into this protective mode. The feeling of living in a simulation is, in many cases, your brain’s way of saying it has been overwhelmed for too long.
Cannabis and Other Substances Can Trigger It
Cannabis is the most common drug trigger for derealization. During intoxication, feelings of unreality typically peak about 30 minutes after use and fade within two hours. For most people, that’s the end of it. But in a subgroup of users, symptoms of depersonalization or derealization persist for weeks, months, or even years after they stop using cannabis entirely. In some cases, the onset is abrupt, emerging during a single session and continuing unremittingly. In others, symptoms don’t appear until hours or days after use.
This means a single bad experience with cannabis can, for some people, flip a switch that doesn’t easily flip back. Other substances linked to derealization include psychedelics, ketamine, and high doses of caffeine. If your simulation feelings started around the time you used any of these, the connection is worth taking seriously.
Screen Time and Virtual Reality Play a Role
Spending large portions of your day in digital environments can blur your brain’s baseline sense of what “real” feels like. Research on virtual reality users found that even a 20-minute VR session produced an upward trend in dissociation scores afterward. While that shift wasn’t statistically significant in a small study, it points to something intuitive: when you spend hours immersed in screens, games, or virtual worlds, your brain’s reality-processing systems get recalibrated.
You don’t need a VR headset for this effect. Endless scrolling through curated social media feeds, binge-watching TV, or spending most of your waking hours in front of a computer can create a similar low-grade dissociation. The world starts to feel like another screen you’re watching rather than something you’re physically part of.
The Philosophy Is Real, but Separate
It’s worth acknowledging the elephant in the room. Philosopher Nick Bostrom’s simulation argument, published in 2003, lays out a logical case that at least one of three things is true: humanity will go extinct before reaching a technologically advanced stage, advanced civilizations have virtually no interest in simulating their ancestors, or the probability that we are living in a simulation is very close to one. The argument is taken seriously in academic philosophy and physics, and figures like Elon Musk have popularized it further.
But there’s an important distinction between engaging with this idea intellectually and feeling it in your body. If you read about the simulation hypothesis and think “huh, interesting,” that’s philosophy. If you walk through your kitchen and the light looks wrong and your hands don’t feel like yours and you can’t shake the sense that none of this is solid, that’s derealization. The two can feed each other. Ruminating on simulation theory when you’re already in a dissociative state can intensify the feeling and make it harder to shake. If this describes you, stepping away from that content for a while is a practical first step.
Grounding Techniques That Work
When the unreality feeling hits, the most effective immediate response is to force your brain back into sensory contact with the physical world. The most widely recommended method is the 5-4-3-2-1 technique. Start by slowing your breathing with long, deep breaths. Then work through your senses: notice five things you can see, four things you can physically touch, three things you can hear outside your body, two things you can smell, and one thing you can taste. This exercise works because derealization is essentially your brain disconnecting from sensory input. Deliberately re-engaging each sense pulls you back.
Beyond acute episodes, the things that help most are unglamorous but effective. Regular physical exercise, especially anything that forces you to be aware of your body (running, swimming, weight training), counteracts the detachment. Reducing screen time gives your brain more unmediated contact with the physical world. Consistent sleep helps regulate the stress response that drives dissociation in the first place.
When the Feeling Becomes a Disorder
The line between a normal experience and a clinical condition is persistence. Most people’s episodes of unreality are brief and infrequent. In depersonalization-derealization disorder, the feelings last a long time or keep coming back. If you’ve felt this way consistently for weeks or months, if it’s interfering with your ability to work or connect with people, or if it’s causing significant distress rather than just mild curiosity, you’re past the threshold where professional help makes a real difference.
Therapy, particularly approaches that address trauma and nervous system regulation, is the primary treatment. Many people with this condition don’t seek help because the feeling itself makes everything seem unimportant, or because they assume it’s just an odd quirk of their personality. It isn’t. It’s a well-documented condition with effective treatments, and it tends to respond well once someone actually addresses it.