Derealization and Depersonalization: Why Nothing Feels Real, and Why It Isn't Madness

The posts are almost interchangeable, which is part of what makes them so striking. Someone is in a supermarket, or on a video call, or halfway through a panic attack, and the world goes flat. Colours look slightly wrong. Their own hands look like someone else's. Their voice sounds like a recording. They know the room is real. It just doesn't feel real, and the gap between knowing and feeling is terrifying. Then comes the line that ends nearly every one of those posts: am I going crazy?

That question is the reason this piece exists, because it deserves a straight answer rather than a symptom list. Derealization and depersonalization are usually your nervous system turning the emotional volume down under too much stress, and the fact that you can ask "is this real?" is the clearest sign that your grip on reality is intact. What tends to keep the feeling going isn't the feeling itself. It's the fear of what it means.

One line before we start: if the unreality comes with hopelessness, or a sense that nothing matters enough to stay for, call or text 988 in the US, 9-8-8 in Canada, or find your country's line at findahelpline.com. That's a different problem from the one this post is about, and it deserves a person right now.

What are derealization and depersonalization?

Derealization is the sense that the world around you isn't real; depersonalization is the sense that you aren't, or that you're watching yourself from outside. The NHS describes depersonalisation as "the feeling of being outside yourself and observing your actions, feelings or thoughts from a distance," and derealisation as feeling that the world is unreal, with people and things seeming "lifeless" or "foggy." You can have one, the other, or both at once.

The descriptions people give are remarkably consistent:

• Derealization: the world looks two-dimensional, like a stage set or a screen. Familiar places feel strange. Sound seems muffled or far away. Time feels off.
• Depersonalization: you feel like a robot running on autopilot. Your reflection doesn't quite register as you. Emotions are muted or missing. Your body feels numb, weightless or not quite yours.

The emotional flatness is not a side detail. In one of the most cited models of depersonalization, researchers Mauricio Sierra and German Berrios proposed that the prefrontal cortex damps down the amygdala, producing a "lack of emotional coloring" that people then report as unreality or detachment. That is a hypothesis, not a settled fact, but it matches what people describe: the world is all there, it's just stopped meaning anything. If that overlaps with feelings going flat more generally, we wrote about emotional numbness separately.

Why does anxiety make everything feel unreal?

Because dissociation is one of the mind's standard responses to overload, and anxiety is overload. The NHS puts it plainly: "Dissociation is a way the mind copes with too much stress," and "switching off from reality is a normal defence mechanism." When your threat system is running hot, turning down the emotional signal is a way of staying functional while it does.

That is why derealization shows up so often alongside panic attacks. A systematic review of the epidemiology by Elaine Hunter, Sierra and Anthony David found depersonalization and derealization were highly prevalent in people with panic disorder, and later work from the same group links the chronic form closely to the anxiety disorders. Sleep deprivation, exhaustion and prolonged anxiety can all set it off. So can drugs: the Merck Manual names marijuana, ketamine and hallucinogens as triggers, and a lot of people's first episode arrives during or after a bad cannabis experience.

Here is the part that matters most, and it comes from the cognitive-behavioural model Hunter and colleagues published in 2003. The episode itself is usually transient. What turns it into something that lingers for months is how you interpret it. If you read the unreality as a sign of severe mental illness or brain damage, you get scared. Fear feeds more anxiety. More anxiety feeds more unreality. The researchers also point to the behaviours that keep the loop spinning: constantly checking whether things feel real yet, avoiding places where it happened, scanning your own mind for signs of decline. Each check increases your awareness of the symptom and confirms that it's a threat.

In other words, the unreality is often a smoke alarm, and the panic about the smoke alarm is what keeps it ringing. This is also why the same thing can feel very different in different bodies: it overlaps with the freeze response, where the nervous system chooses shutdown over fight or flight.

How common is it, and is it the same as psychosis?

Very common, and no. The Merck Manual estimates that between 25% and 75% of people have had at least one transient episode of depersonalization or derealization, while only around 1 to 2% ever meet the criteria for the disorder. A 2023 systematic review by Jiaying Yang and colleagues put the general-population rate of the disorder at about 1%.

So if you've had an episode or two, you're in the majority of people who have ever lived through a truly stressful stretch. That's worth sitting with before you run another search.

The psychosis question is the one people are really asking, so here it is directly. In depersonalization and derealization, reality testing stays intact. The Merck Manual's wording is that people "always retain the knowledge that their experiences are not real." You feel like the world is a dream, and you know it isn't. That as if is the defining feature.

In psychosis, the as-if disappears. A person doesn't feel like their neighbours are actors; they believe it. They don't feel detached from their thoughts; they believe the thoughts are being put there. The distress you feel about "is this real?" is, paradoxically, evidence that you can still tell the difference.

We're not going to tell you that this rules out every other cause. Only a clinician who has assessed you can do that. But the fear that derealization is the first step towards "losing it" is not supported by how these experiences are defined or how they usually go.

What should you do in the moment, and when is it worth seeing someone?

In the moment, stop fighting it and give your senses something concrete; if it keeps coming back or won't leave, see a doctor or therapist, because it's treatable. Those are two different problems with two different answers.

During an episode:

• Name it. Out loud if you can: "This is derealization. It's anxiety. It's uncomfortable and it's not dangerous." Labelling directly targets the catastrophic interpretation that keeps the loop going.
• Stop testing it. Staring at your hands to see if they feel like yours yet is a safety behaviour in exactly the sense the CBT model describes. It keeps your attention glued to the symptom.
• Feed your senses. Cold water on your wrists, something with a strong taste or smell, your feet pressing into the floor, naming five things you can see. The classic 5-4-3-2-1 grounding technique exists for moments like this. Grounding is among the techniques the Merck Manual lists in psychological treatment of the disorder, although on its own it doesn't fix anything; it just gets you through the next ten minutes. If focusing on your body makes the unreality worse, which happens for some people, switch to something outside it: count backward in sevens or name animals A to Z.
• Slow the exhale. If panic is driving it, longer out-breaths than in-breaths can help your body come down from the alarm state.
• Carry on with what you were doing, gently. Leaving the supermarket every time it happens teaches your brain that the supermarket is dangerous.

Expect the feeling to fade rather than snap off. The researchers who built the CBT model describe these episodes as normally transient; what they don't do is leave on command.

When it's worth a professional:

Depersonalization-derealization disorder is diagnosed when the experiences are persistent or recurrent and cause real distress or get in the way of your life, with reality testing intact, and when they aren't better explained by a substance, a medication or another condition. Rough markers that it's time to book an appointment:

• It has lasted weeks, or keeps coming back.
• You're organising your life around it: avoiding places, checking constantly, unable to work or concentrate.
• It started after drug use and hasn't gone away.
• It arrived alongside other new symptoms, such as severe headaches, fainting, memory gaps or anything neurological. The NHS notes a GP may examine you and run tests to check whether another illness is the cause.
• You or the people close to you notice that it has stopped feeling like as if, for example you're genuinely unsure whether the world is fake. That needs prompt assessment, not self-help.

On treatment, the honest picture is modest. The Merck Manual describes cognitive techniques, grounding, behavioural approaches and psychodynamic therapy, plus medication aimed at co-occurring depression or anxiety, and says complete recovery is possible for many people while some develop chronic symptoms. Research on CBT specifically for this disorder is still small. If you see anyone promising a guaranteed cure, that's ahead of the evidence.

Frequently asked questions

Can derealization cause psychosis or schizophrenia? There is no good evidence that ordinary derealization turns into psychosis. The defining difference is that in depersonalization and derealization you know the experience isn't literally true; in psychosis that knowledge goes. If you're worried because of family history or other symptoms, see a doctor, but the unreality itself is not a stage on the way to schizophrenia.

How long does derealization last? Nobody can give you a number. Episodes are normally transient, and the ones tied to panic or acute stress tend to ease as the anxiety comes down. They can persist for longer after prolonged stress, poor sleep or drug use. If it has lasted weeks or keeps returning, that's the point to get assessed rather than wait it out, because the fear-and-checking loop tends to entrench it.

Is derealization a sign of brain damage? In the overwhelming majority of cases, no. It's a very common response to stress and anxiety. New unreality alongside neurological symptoms (fainting, seizures, severe headache, weakness, memory gaps) is a different situation and should be checked by a doctor promptly.

Why does it get worse when I think about it? Because attention and fear are fuel. The cognitive-behavioural model of depersonalization argues that reading the feeling as dangerous, then checking and monitoring it, is what keeps a normally transient experience going. The practical implication is counterintuitive: the less you interrogate it, the faster it tends to fade.

Sources and further reading

• Hunter ECM, Sierra M, David AS (2004). "The epidemiology of depersonalisation and derealisation: a systematic review." Social Psychiatry and Psychiatric Epidemiology
• Yang J, Millman LSM, David AS, Hunter ECM (2023). "The Prevalence of Depersonalization-Derealization Disorder: A Systematic Review." Journal of Trauma & Dissociation
• Hunter ECM, Phillips ML, Chalder T, Sierra M, David AS (2003). "Depersonalisation disorder: a cognitive-behavioural conceptualisation." Behaviour Research and Therapy
• Sierra M, Berrios GE (1998). "Depersonalization: neurobiological perspectives." Biological Psychiatry
• Merck Manual Professional Version. "Depersonalization/Derealization Disorder."
• NHS. "Dissociative disorders."

ILTY won't tell you the unreality isn't happening, and it can't diagnose you. What it can do is be there at 2am when the room goes flat: a companion to say the true sentence out loud to ("this is derealization, it's anxiety"), a 5-4-3-2-1 grounding exercise and breathing practices in the iPhone app's Toolkit, which works offline, and a mood check before and after so you can see whether the episode actually eased. If it keeps coming back, that's a conversation for a doctor or therapist, and ILTY is not a substitute for one. Try it free.