Fear of insomnia: how worrying about sleep becomes the reason you don't sleep

It’s only six in the afternoon, but somewhere in the background a quiet hum has already started: soon it will be evening. Soon it will be time for bed. And what if it doesn’t work again? The day may have been perfectly fine — but the closer the night comes, the more something tightens in your chest. By ten in the evening the hum has become an alarm: now I have to fall asleep, or tomorrow will be a catastrophe. You lie down, wide awake, and exactly what you feared all day happens again.

If you know this, then you know that the worst part of chronic insomnia often isn’t the wakefulness itself — it’s the fear of it. A fear that begins in the afternoon, that colours the evenings and turns the night into an exam. And here is the cruel irony we’ll unpack fully in this piece: in chronic insomnia that very fear is most often the main reason you don’t sleep. The good news is that fear — unlike sleep — can be tackled directly. I’ll show you how this loop turns and where it can be cut.

Anticipatory anxiety: when the night starts in the afternoon

Psychology knows the phenomenon of anticipatory anxiety — anxiety about an event that hasn’t happened yet. In insomnia its object is unusual: you aren’t afraid of something that will happen, but of something that won’t — sleep. The body, though, doesn’t know the difference: a threat is a threat. So the stress system starts preparing for the night hours in advance — and you bring into bed not only your tiredness but the whole afternoon’s charge.

In my work I notice that this fear likes to spread backwards through the day: at first only the night was hard, then the evening, then the afternoon at the thought of the evening. Some people describe how Sunday afternoons are soured by thoughts of Monday night. Sleep, which ought to be the most self-evident part of the day, becomes its central threat. In the years of my own insomnia it was the evenings I hated most — I’ve written about how that was and what pulled me out of it in my piece on how I overcame insomnia.

A self-fulfilling prophecy: why fear reliably keeps you awake

Why does the fear of insomnia lead so reliably to insomnia itself? The mechanism is relentlessly logical. For the body, fear is an alarm: it triggers the sympathetic nervous system, raises the heart rate, tightens the muscles, sharpens the senses and the thoughts. In short — it produces arousal. Sleep, meanwhile, requires the opposite: that the nervous system judges it safe to let go of control and hands the wheel to settling down. Fear of wakefulness therefore physiologically produces wakefulness; how that switch works behind the scenes I’ve explained in more detail in my piece on insomnia and the nervous system.

That’s how a perfect self-fulfilling prophecy arises: you fear you won’t sleep → the fear raises arousal → arousal prevents sleep → the next day you have fresh proof the fear was justified → tonight you’re even more afraid. Every sleepless night confirms the prophecy, every confirmation strengthens the fear. The loop turns on its own — the trigger that once set it going (a stressful period, an illness, a worry) may be long gone.

An important detail: this loop often starts up in people who aren’t otherwise particularly anxious. A few bad nights in a vulnerable period and a single thought — “I can’t afford this any more” — are enough for the machine to be assembled. That’s exactly why the fear of insomnia isn’t measured by how “nervous” someone is, but by how much weight the night has come to carry in their life.

The psychologist Allison Harvey described another cog of this machine in her cognitive model of insomnia (2002): selective attention. A frightened mind starts monitoring night and day — at night it listens in on the body (“am I getting sleepy yet?”), checks the clock, assesses every sound; by day it looks for signs of tiredness and attributes every yawn to the bad night. This monitoring has two consequences: attention itself is a form of wakefulness, and what you look for you find — anyone who searches persistently enough will find signs of tiredness in their body. The perceived threat grows, and the fear with it.

Catastrophising: “tomorrow the system will collapse”

The fuel of this loop is thoughts about consequences. “If I don’t sleep tonight, tomorrow’s presentation will be a disaster.” “I’m ruining my health.” “I can’t keep this pace up much longer.” Harvey and colleagues showed that people with insomnia systematically overestimate the consequences of a bad night — research on daytime functioning shows real, but considerably smaller effects than night-time panic predicts. After a bad night the body manages incomparably more than you believe at three in the morning; almost everyone living with insomnia has “survived the unsurvivable” a hundred times already — and it’s precisely this evidence that catastrophic thoughts overlook.

Catastrophising is a general pattern of anxious thinking — I’ve written about how anxious thoughts inflate threats and how to handle them in my piece on anxious thoughts — but in insomnia it has a particularly insidious quality: catastrophic thoughts about the consequences of wakefulness happen at night, when the prefrontal brake is at its weakest and there’s no one to bring them back down to earth. At three in the morning every thought sounds like the truth.

Safety behaviours: life jackets that pull you under

Harvey’s model points to one more, often overlooked part of the machine: safety behaviours. These are all the things you do to protect yourself against a bad night and its consequences — and which in fact feed the loop. Turning down evening social events “so as not to miss the sleep window”. Going to bed early “to gather more hours”. Lying in bed until late morning “so at least I’m resting”. Cancelling commitments after a bad night. Coffee on a drip. Days off planned around the night.

Each of these behaviours is understandable in the short term — and harmful in the long term, for two reasons. The first is physiological: going to bed early and lying in dilute sleep (more hours in bed with the same amount of sleep means shallower, more fragmented sleep), while naps and coffee undermine sleep pressure. The second is psychological and more insidious: a safety behaviour never lets you experience that things would have been fine without it. If you write off the day after every bad night, you never find out that you could have managed it — and the belief in catastrophe stays untouched. The life jacket stops you discovering that you can swim. So part of the way out of fear is precisely the gradual laying down of these jackets: living the day despite a bad night is the strongest counter-evidence fear can ever be given.

Orthosomnia: when perfect sleep becomes a project

The modern version of this fear is worn on the wrist. Apps and wristbands that measure sleep are an innocent toy for curious good sleepers — but for someone who fears insomnia they can be petrol on the fire. Kelly Baron and colleagues (2017) described a phenomenon they named orthosomnia: a perfectionist striving for perfect, “correct” sleep, driven by tracker data. In their clinical cases people extended their hours in bed to improve the numbers, became distressed by sleep scores and trusted a poor app result more than their own sense of how they felt — even when laboratory measurements showed they were sleeping perfectly decently.

The trap is twofold. First, commercial trackers measure sleep stages inaccurately — the morning number is an estimate, not a diagnosis. Second and more importantly: every morning assessment of the night feeds exactly the monitoring and perfectionism that maintain insomnia. Sleep has become another project that has to succeed — and things that have to succeed are things we’re tense about. If you recognise yourself here, one of the most therapeutic measures is surprisingly simple: put the tracker in a drawer for a few weeks. The same goes for obsessively fulfilling sleep rules — I’ve written about when hygiene becomes part of the problem in my piece on sleep hygiene.

How to dismantle the fear: three cuts into the loop

Because the loop of fear turns through several stations, it can be cut in several places. In practice a combination of three cuts works best.

The first cut: decatastrophising — take the poison out of the threat. Catastrophic thoughts don’t disappear on command, but they lose their power when you confront them with facts. Ask yourself: how many times have I already got through a day after a bad night — and what actually happened? (As a rule: I was tired, irritable, less focused. Unpleasant — not a catastrophe.) Knowledge helps too: after a bad night the body increases the proportion of deep sleep the following night; the system regulates itself if you don’t stand in its way. The aim isn’t to convince yourself that insomnia doesn’t matter — the aim is to move the night from the category “danger” into the category “discomfort”. The nervous system, after all, doesn’t respond to discomforts, it responds to dangers.

The second cut: accepting wakefulness — step out of the fight. This sounds like surrender, but it’s the strongest move in the game: wakefulness stops being the enemy. If you wake, you wake; you lie in the dark, you breathe, you rest — even lying quietly awake is rest for the body, though it isn’t sleep. When wakefulness no longer has to be prevented at all costs, all the effort around it falls away — and it was exactly that effort that kept the arousal up. The paradox of acceptance: only when falling asleep is no longer essential can sleep come again.

The third cut: paradoxical intention — reverse the intention. Behavioural therapy goes a step further: instead of trying to fall asleep, try calmly to stay awake — lying in the dark, eyes open, no screen, making no effort in either direction. As long ago as 1979, Ascher and Turner showed in a controlled study that this technique significantly improves sleep onset. It works because it removes performance anxiety: if the task is “stay awake”, then you can’t fail the sleep exam — and with no exam there are no nerves. Many people are astonished to find that it’s precisely when they’re “allowed” to be awake that sleep starts pulling at them.

Why you can’t do this “on command” — and when to seek support

You may be wondering why I don’t mention the most obvious strategy — reassurance. “It’ll be fine, you’ll fall asleep, don’t worry.” From experience and from anxiety research we know that this kind of comforting works poorly: fear doesn’t retreat before a promise that the terrible thing won’t happen, because no one can give that promise — and the mind knows it. It retreats only when the terrible thing loses its status as a catastrophe. That’s why all three cuts aim there: not “you’ll fall asleep”, but “even if you don’t fall asleep, you’ll be all right”. That’s the essential difference — the first sentence needs luck, the second holds through any night.

You can try all three cuts on your own, and for many people that alone turns things around. But be realistic: a fear built up over months or years rarely gives way after one article. Besides, the fear of insomnia is often not alone — beneath it there tend to lie a deeper perfectionism (“I have to sleep correctly too”) and a need for control, and sometimes the night is frightening because it’s the only time when the world falls silent and everything pushed aside speaks up. Then working with sleep becomes working with what the night brings.

A structured way out of the loop is offered by cognitive behavioural therapy for insomnia, which brings all the cuts described here — decatastrophising, work with behaviour, the relationship with wakefulness — together into a proven programme; I’ve described it in my piece on CBT-I. And if you feel your fear of the night is part of a wider story, you’re welcome to get in touch with me. From my own experience I can tell you two things. First: the fear of the evening is one of the loneliest fears there is, because those around you don’t understand it — “you’re only sleeping, what can be so bad about that?” In the years of my insomnia what I dreaded most was the moment when everyone else went to bed and I was left alone with the night ahead of me; no one around me knew that my day peaked in dread at eleven in the evening. And second: this fear can be overcome. It doesn’t disappear overnight and it doesn’t disappear in a straight line — but one evening you notice that you looked at the clock without your chest tightening. Evenings can be just evenings again.