Derealization and POTS: Why You Feel Detached From Reality

You are standing in line, or mid-conversation, and something shifts. The world in front of you stops feeling solid. It is like watching your own life through glass, or moving through a dream you cannot quite wake up from. Your hands might not feel like they belong to you. People reach for different words to describe it. Spacey. Floaty. Detached. Out of body. And more often than not, when you have tried to explain it, someone has reached for the same word back: anxiety.

If you have POTS or another form of dysautonomia, this second layer of symptoms tends to get waved off. The heart rate is high, standing makes it worse, so the whole visit narrows to it. Get the rate down, get the blood pressure up, manage the numbers. The feeling of unreality gets filed under stress and left there.

That is a mistake, and not a small one. This symptom is not static on top of the real problem. It is one of the most useful signals you have for locating where the problem actually lives, in the brain or the body, and how to unwind it.

What Derealization and Depersonalization Actually Are

The words get used loosely, so it helps to split them in two. Depersonalization is the sense that you are not you, that the self behind your eyes has gone remote. Derealization is the sense that the world is not real, that your surroundings are dreamlike or staged and you cannot connect to them. They travel together often enough that most people feel them as one, and that is fine. What matters is where in the brain they point.

They point to a region behind and above your ear, where the parietal and temporal lobes meet. Think of it as a hub. Signals from every sensory system arrive there, what your eyes see, what your inner ear reports about balance, where your body senses itself in space, and get woven into one coherent picture. That picture then gets passed along, including to the limbic system, which hands it an emotional read: a sense that this moment is real and that it is happening to you. When the hub cannot line those inputs up, the emotional tag does not attach the way it should. What is left feels exactly like what people describe. Present, but not present. Awake inside a dream.

Why This Is a Brain Signal, Not Just Anxiety

Type these sensations into a search bar and the results converge fast on a short list: anxiety, ADHD, autism, a panic symptom to breathe through. For a community told for years that a racing heart was nervousness, that pattern is exhausting and familiar. The feeling of unreality is real, and it leaves a physical trail you can follow.

There is direct evidence for that trail. In a study of patients with peripheral vestibular disease, researchers found depersonalization and derealization symptoms were far more frequent and more severe than in healthy controls, and could bring the same feelings on in the lab by stimulating the balance organs. Their explanation was mechanical, not psychological: when the vestibular signal is distorted, it mismatches the other senses, the brain cannot build a coherent frame of where you are, and you feel detached from the world. That is the opposite of a symptom you invented. It is a readout of how well your senses are being stitched together. Sorting out where the feeling comes from is the same work as telling POTS apart from anxiety. The sensations overlap. The mechanisms, and the treatments, do not.

Neuronal Dysfunction vs Cerebral Blood Flow: The Key Difference

Here is where it gets useful, because two people can walk in with nearly identical descriptions and have very different things going on. There are two broad ways this hub stops working, and one simple question usually tells them apart.

The first is neuronal. The processing tissue itself is not communicating the way it should, often after a concussion, a car accident, or an infection, something that left those pathways weaker. When the problem is in the neurons, position does not change much. Lying down or standing up, it is roughly the same, because the wiring is the issue no matter where your head sits.

The second is fuel. If your brain is not getting enough blood flow, the neurons have the capacity to work but not the energy to run. As perfusion drops, the picture is less like a broken circuit and more like a light on a dimmer switch, getting weaker and weaker. And this one has a signature: it is worse when you are upright and better when you lie down, because that is when blood flow to the head falls and then recovers. Reduced brain perfusion is not a soft claim. Research on people with chronically low blood pressure has tied it to measurable drops in attention and memory, and to a brain that cannot ramp its own blood flow up on demand. When your cerebral blood flow falls 20, 30, even 40% on standing, the place it shows up first is often that fragile sense of self and surroundings. It is the same shortfall behind brain fog, and why blood flow to the brain drops is what separates the two paths.

Where PPPD and Vestibular Dysfunction Fit In

A fair question at this point: where does the vestibular system come into it? It matters more than almost anything, because balance is where much of that baseline information starts, telling the brain where your head is and matching it to the world. When the inner ear is off, the hub downstream inherits the problem. Newer work has traced this pathway, showing that derealization symptoms track with specific vestibular deficits, with spatial disorientation as the bridge. Vestibular dysfunction rarely stays in its lane. It feeds anxiety, fog, and this sense of detachment right alongside the dizziness.

Some of you have already been to an ENT. They squirted warm and cool water into your ears, watched your eyes behind goggles, and told you everything looked fine. If the balance organs test clean but you are still dizzy all the time, the conversation shifts toward PPPD, persistent postural-perceptual dizziness. The name describes a dizziness that does not originate in the inner ear itself but in how the brain reads what the ear sends up. The signal comes in clean and gets misread higher up. PPPD is a close cousin of derealization for exactly that reason. Both are disorders of a processor that is receiving good information and struggling to make sense of it. And both split along the same line, neurons or fuel, which is why pinning down the specific type of vestibular problem is part of the work rather than an afterthought.

How We Test Whether Your Symptoms Follow Blood Flow

So how do you actually tell these apart instead of guessing? You measure. On a tilt test, our team can track cerebral blood flow in real time with transcranial Doppler ultrasound and watch what happens to it as the body goes from lying to upright. If perfusion drops, we ask a direct question: at that exact moment, are the derealization symptoms showing up too? Then we probe further, gently shifting the inputs to see whether we can bring the feeling on or ease it, and whether your sense of your own body, where your limbs are and where vertical is, moves with the blood flow.

We can run the same trace through the vestibular pathway. Turn the head, follow a target, and watch whether the eyes and the processing keep up or fall behind. Two paradigms, one for the neurons and one for the fuel, and we follow each string until it frays.

That difference is not academic. If the driver is blood flow, no amount of vestibular exercise will hold until the brain is keeping perfusion up on its own, so that comes first and the signal work comes after. If the driver is the neurons, the fuel is fine and the pathways themselves need rebuilding, the same way you would train any skill back. Either way, this reaches well beyond getting a heart rate down. Calming the heart rate might make you less afraid of the number, but it does nothing to make the neurons stronger or the blood flow steadier, and those are the two things that decide whether the world starts feeling real again.

If this is the part of your experience that no one has taken seriously, it may be the part that finally points to an answer. It is not a character flaw, and it is not just anxiety. It is a signal, and it is one we know how to measure.

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