When 2,316 adults who had never had insomnia were asked about the stresses in their lives, and then followed for a year, two things predicted who would develop it. One was obvious: how much stress came their way. The other was not. It was how much their sleep had always tended to react to stress in the first place, and how often the thoughts about that stress kept barging back in.
Same stress, different nights. Some people's sleep shrugs off a bad week. Others lie awake doing the maths: if I fall asleep now, I get five hours, then four and a half, then four, and tomorrow is already lost. Each worry brings two more. By morning you face a hard day with half your resources, which makes the next night more likely to go the same way. Arithmetic is a terrible sleeping pill.
That is the stress-sleep vicious cycle. It runs in both directions, and it grips some of us much harder than others.
Both directions
Stress keeps you awake. That part needs no proof.
The other direction is less obvious. The Sleep-Immune Connection, linked below, has the numbers: in young men, cortisol over the evening hours ran 37% higher after a night cut to four hours, and 45% higher after a night with no sleep, and it took at least an hour longer to settle. That is the tired-but-wired evening after a bad night, and the reason the early night you planned is harder to get.
And the mood follows. Emergency Stress Relief: What to Do When You're Completely Overwhelmed has it in one line: even modest night-to-night losses of sleep predicted more anxiety the next day. A short night lowers the threshold for everything.
So the loop closes. Stress shortens the night, the short night raises the stress, and the higher stress shortens the next night. A loop with no exit sign.
Why your sleep may react more
Some people sleep through a crisis. Others lose sleep over a parking ticket. That difference has a name, sleep reactivity, and a questionnaire to measure it, the Ford Insomnia Response to Stress Test, which asks how likely you are to sleep badly before an important meeting, after a stressful day, or after bad news.
When 1,782 young adult twins filled it in, about a third of the difference between people turned out to be inherited: 29% in women, 43% in men. The rest came from life. One in five of them already had insomnia.
So if your sleep has always been the first thing to go when life gets hard, that is not weakness. It is a trait, partly handed down, and it means the tools in this article matter more for you than for the partner snoring beside you. Who, irritatingly, was always going to sleep fine.
How a bad patch tips over
A few bad nights after a shock are normal. When good sleepers in the UK were followed for a year, between 31% and 37% of them had a bout of short-term insomnia. A bout like that is short by definition. The question is what turns it into something longer.
What turns a bout into a habit is mostly what happens next. In the year-long follow-up from the opening, it was not stress alone that tipped people into insomnia. It was stress plus the thoughts about it that kept intruding, and people whose sleep reacted strongly were the ones those thoughts hit hardest. And it did not stop at sleep: in the same people, strong sleep reactivity also led on to depression, by way of the insomnia. That is a good reason to act on a bad patch early.
The habits do the rest. Chronic Insomnia: Why Trying Harder Keeps You Awake, linked below, has how it happens: the early nights to "bank" rest, the lie-ins, the hours spent in bed waiting for sleep. Each one feels like recovery, and each one makes the next night worse. Keep getting up at your usual time, however the night went, and the bad patch has the best chance of staying a patch. Banking sleep is the one bank that charges you for deposits.
The head in bed
Racing thoughts tend to arrive when the day goes quiet. Nothing else is competing for your attention, so the unfinished business moves in.
Write the list. How to Boost Energy Levels Naturally: Little-Known Remedies That Actually Work has the test: 57 young adults spent five minutes before bed writing either a to-do list for the coming days or a list of what they had already done. The to-do group fell asleep faster, and the more specific their list, the faster. Get the tasks out of your head and onto paper, and your head has less to guard.
Give the worry a time. Why Your Stress Management Backfires has the students who put their worrying off to a set worry period each day and ended up with fewer bodily complaints. At night, the same trick sounds like: "Not now. That one goes in tomorrow's slot."
Solve it on paper, earlier. For five nights, 33 students with insomnia wrote down either possible solutions to their worries or the worries themselves. The ones who wrote solutions went to bed with less mental arousal than the ones who only wrote the worries down. Earlier in the evening, give each worry one next step, and it has less to say at night.
Name the thought. When the same worry comes round again, say it to yourself as a thought: "I'm having the thought that tomorrow will be a disaster." It is still there. It just stops sounding like a fact. Thoughts are not memos from the future.
End on something good. End Your Day Right: How Gratitude Before Sleep Can Help You Rest has the gratitude findings: across 19 controlled tests of gratitude exercises, sleep quality improved in five of the eight that measured it. A gentle help rather than a cure, and it costs nothing.
Picture something
"Think about something else" is the classic advice, and it is harder than it sounds. 5 Practical Ways to Cultivate a Positive Mindset has why: people told not to think about a white bear for five minutes kept thinking about it, and when they were later allowed to, it came back more often than for people who had never tried to push it away.
What helps is something more specific. End Your Day Right, linked above, has the test: 41 people with insomnia were given different instructions for one night, and those taught to picture an absorbing scene in rich detail fell asleep sooner than those given no instructions. A general instruction to distract themselves did not help. A detailed picture gives the mind enough to do that it stops going back to the worries.
So choose your scene in the daytime, a favourite walk taken step by step, say, or a room you would redecorate down to the door handles, make it rich in detail, and have it ready.
Try to stay awake
The most counterintuitive tool for a stressed head is to stop trying to sleep.
In 2003, 34 people who struggled to fall asleep were split into two groups. For two weeks, one group was told to lie in bed and try, gently, to stay awake. The other group carried on as usual. The stay-awake group made less effort to sleep and felt less anxious about it, and by their own reports they fell asleep faster. Their wrist sensors did not show the change, which may say as much about how people with insomnia judge their nights as about the method.
There is a reason for that. People with insomnia tend to overestimate how long they take to fall asleep and underestimate how long they sleep, compared with what the instruments record. The tendency is widespread, though not universal. The night is usually less bad than it feels. Your nights are probably better than your reviews of them.
A sleep tracker can make that worse rather than better. Why You're Still Exhausted Despite Doing Everything Right has the name sleep clinics use for people made sleepless by their sleep data, orthosomnia, "a perfectionistic quest for the ideal sleep". It also has the seven consumer trackers that, against a full sleep-lab recording, were good at telling sleep from wake, inconsistent at sleep stages, and worse on nights of poor sleep, which are the nights you look.
The point is not the trick itself. It is what it removes: the pressure. Sleep is the one thing in life that gets harder the more you try. Rest is still rest. Lying quietly in the dark is not a failure.
The body in bed
When the stress has settled in your shoulders rather than your head, the tools are physical.
Natural Remedies for Insomnia: Match the Remedy to the Reason has them: a warm bath or shower an hour or two before bed, which pulls blood to the hands and feet so the core cools faster afterwards; tensing and letting go each muscle group in turn, from the feet to the face; and slow breathing with the breath out longer than the breath in. Reset Your Body Clock: Sleep Hacks, Tested adds warm feet and a dark bedroom; a contoured mask such as this makes the room dark wherever it is. And for a body that settles under weight, a blanket such as this is worth a try: Why Your Nervous System Fights Some Stress Techniques has the test in which a heavy blanket eased insomnia in people with anxiety and depression.
Most of these need nothing you do not already own, and none of them asks you to stop worrying first. They work from the outside in.
And if you are lying there wide awake and getting frustrated, get up. Chronic Insomnia, linked below, has why: go somewhere dim, read something undemanding under a low amber light such as this , and come back when you are sleepy, as many times as the night needs.
What the day does to the night
A stressed night is often built in the daytime.
Coffee is the first thing to look at. Boost Your Energy Naturally: Alternatives to Caffeine has why it hides tiredness rather than removing it, and why the bill arrives at night. Chronic Insomnia, linked below, has why a fixed wake-up time and no lie-in do more for the night than anything you add at bedtime. Reset Your Body Clock has morning daylight, early meals and a dark evening. And skip the nightcap: alcohol gets you to sleep sooner and then breaks up the second half of the night, exactly when the small-hours thinking starts. The nightcap is a loan with a small-hours repayment.
Put the screen away too. How to Boost Energy Levels Naturally, linked above, has the people who read on a lit screen before bed: they took longer to fall asleep, made less melatonin and were less alert the next morning than when they read a printed book.
And move. In 2010, 48 people with chronic insomnia did a single session of exercise, or none. After moderate aerobic exercise, they fell asleep 55% faster on the sleep recording, slept 18% longer and were 15% less anxious. Hard aerobic exercise and weight training did not do the same. The steady, moderate kind, such as a brisk walk, is the one that helped.
After a crisis
A bereavement, a redundancy, a diagnosis, a break-up: some stress arrives all at once and takes the nights with it.
Expect the first nights to be bad. That is a normal response, not the start of a disorder. Keep the shape of the day as steady as you can: the same wake-up time, daylight, meals, some movement. Use the smallest version of the tools above that you can manage: one list, one scene, one slow breath out. And do not start banking sleep with early nights and lie-ins, because that is how a bad patch becomes insomnia.
And check that it is stress at all. Ways to Stop Snoring Naturally—Which One Will Work for You? has the signs worth getting checked for sleep apnoea: loud snoring with gasping or choking, pauses in breathing that someone else has noticed, and heavy sleepiness by day.
If sleep is still badly broken weeks later, or the stress is taking over your days, get help. The treatment with the strongest record for insomnia is a short talking course, and Chronic Insomnia has how it works.
Breaking the loop
The people in the opening follow-up who tipped into insomnia were not the ones with the most stress. They were the ones whose stress kept coming back into their heads at night, on top of sleep that reacted strongly to begin with.
You cannot always change the stress, and you cannot change the trait. You can change what happens in your head at night, and what you do with the hours around it.
Tonight, before bed, write tomorrow's to-do list, as specifically as you can, and leave it outside the bedroom.
Bad patch turning into a habit? Chronic Insomnia: Why Trying Harder Keeps You Awake — why effort backfires, spending less time in bed to sleep more, giving the bed one job, and answering the small-hours maths.
Worried about what short nights are doing to you? The Sleep-Immune Connection: What One Sleepless Night Does to Your Defences — where the line for catching colds falls, why nine hours looks no safer than five, how to sleep through a cold, and how to get through the day after a bad night.
Know someone who does sleep maths every night? Send them this, and a pen for tomorrow's list.
Disclaimer: This article is general information. For advice about your own health, talk to a qualified health professional, especially if poor sleep lasts for weeks, if you snore loudly or stop breathing in your sleep, or if your mood stays low. If you have thoughts of harming yourself, contact a crisis line or emergency services straight away. Do not stop a prescribed medicine without advice.
Affiliate Disclosure: This article contains affiliate links. As an Amazon Associate, All For Life earns from qualifying purchases, at no extra cost to you. We only link to products we would recommend without the commission.
Sources
Drake CL, Pillai V, Roth T (2014). Stress and sleep reactivity: a prospective investigation of the stress-diathesis model of insomnia. Sleep 37(8):1295–1304. doi.org/10.5665/sleep.3916
Leproult R, Copinschi G, Buxton O, Van Cauter E (1997). Sleep Loss Results in an Elevation of Cortisol Levels the Next Evening. Sleep 20(10):865–870. doi.org/10.1093/sleep/20.10.865
Ben Simon E, Rossi A, Harvey AG, Walker MP (2020). Overanxious and underslept. Nature Human Behaviour 4(1):100–110. doi.org/10.1038/s41562-019-0754-8
Drake CL, Friedman NP, Wright KP, Roth T (2011). Sleep reactivity and insomnia: genetic and environmental influences. Sleep 34(9):1179–1188. doi.org/10.5665/SLEEP.1234
Ellis JG, Perlis ML, Neale LF, Espie CA, Bastien CH (2012). The natural history of insomnia: focus on prevalence and incidence of acute insomnia. Journal of Psychiatric Research 46(10):1278–1285. doi.org/10.1016/j.jpsychires.2012.07.001
Scullin MK, Krueger ML, Ballard HK, Pruett N, Bliwise DL (2018). The effects of bedtime writing on difficulty falling asleep: A polysomnographic study comparing to-do lists and completed activity lists. Journal of Experimental Psychology: General 147(1):139–146. doi.org/10.1037/xge0000374
Brosschot JF, van der Doef M (2006). Daily worrying and somatic health complaints: testing the effectiveness of a simple worry reduction intervention. Psychology & Health 21(1):19–31. doi.org/10.1080/14768320500105346
Carney CE, Waters WF (2006). Effects of a structured problem-solving procedure on pre-sleep cognitive arousal in college students with insomnia. Behavioral Sleep Medicine 4(1):13–28. doi.org/10.1207/s15402010bsm0401_2
Boggiss AL, Consedine NS, Brenton-Peters JM, Hofman PL, Serlachius AS (2020). A systematic review of gratitude interventions: Effects on physical health and health behaviors. Journal of Psychosomatic Research 135:110165. doi.org/10.1016/j.jpsychores.2020.110165
Wegner DM, Schneider DJ, Carter SR, White TL (1987). Paradoxical effects of thought suppression. Journal of Personality and Social Psychology 53(1):5–13. doi.org/10.1037/0022-3514.53.1.5
Harvey AG, Payne S (2002). The management of unwanted pre-sleep thoughts in insomnia: distraction with imagery versus general distraction. Behaviour Research and Therapy 40(3):267–277. doi.org/10.1016/S0005-7967(01)00012-2
Broomfield NM, Espie CA (2003). Initial insomnia and paradoxical intention: an experimental investigation of putative mechanisms using subjective and actigraphic measurement of sleep. Behavioural and Cognitive Psychotherapy 31(3):313–324. doi.org/10.1017/S1352465803003060
Harvey AG, Tang NKY (2012). (Mis)perception of sleep in insomnia: a puzzle and a resolution. Psychological Bulletin 138(1):77–101. doi.org/10.1037/a0025730
Baron KG, Abbott S, Jao N, Manalo N, Mullen R (2017). Orthosomnia: Are Some Patients Taking the Quantified Self Too Far? Journal of Clinical Sleep Medicine 13(2):351–354. doi.org/10.5664/jcsm.6472
Chinoy ED, Cuellar JA, Huwa KE, et al. (2021). Performance of seven consumer sleep-tracking devices compared with polysomnography. Sleep 44(5):zsaa291. doi.org/10.1093/sleep/zsaa291
Haghayegh S, Khoshnevis S, Smolensky MH, Diller KR, Castriotta RJ (2019). Before-bedtime passive body heating by warm shower or bath to improve sleep: A systematic review and meta-analysis. Sleep Medicine Reviews 46:124–135. doi.org/10.1016/j.smrv.2019.04.008
Ekholm B, Spulber S, Adler M (2020). A randomized controlled study of weighted chain blankets for insomnia in psychiatric disorders. Journal of Clinical Sleep Medicine 16(9):1567–1577. doi.org/10.5664/jcsm.8636
Ebrahim IO, Shapiro CM, Williams AJ, Fenwick PB (2013). Alcohol and Sleep I: Effects on Normal Sleep. Alcoholism: Clinical and Experimental Research 37(4):539–549. doi.org/10.1111/acer.12006
Chang AM, Aeschbach D, Duffy JF, Czeisler CA (2015). Evening use of light-emitting eReaders negatively affects sleep, circadian timing, and next-morning alertness. Proceedings of the National Academy of Sciences 112(4):1232–1237. doi.org/10.1073/pnas.1418490112
Passos GS, Poyares D, Santana MG, Garbuio SA, Tufik S, Mello MT (2010). Effect of acute physical exercise on patients with chronic primary insomnia. Journal of Clinical Sleep Medicine 6(3):270–275. doi.org/10.5664/jcsm.27825
Qaseem A, Kansagara D, Forciea MA, Cooke M, Denberg TD (2016). Management of chronic insomnia disorder in adults: a clinical practice guideline from the American College of Physicians. Annals of Internal Medicine 165(2):125–133. doi.org/10.7326/M15-2175