Most stress-related insomnia fades, and a few early choices keep it that way

Key takeaways

• In a year-long U.S. study of 1,248 good sleepers who kept daily sleep diaries, 27% had a bout of short-term insomnia, and about 72% of them got their good sleep back¹.
• Sleep reactivity, a trait that is partly inherited, predicts who sleeps badly under stress; in one study, people with high scores on a nine-question scale had about 3.3 times the odds of new insomnia a year later⁵⁸.
• Going to bed early, sleeping in and napping feel like sensible fixes, but the leading model of insomnia says they can keep it going after the stress has passed⁹.
• In a small trial at Northumbria University, one hour-long session of insomnia therapy plus a pamphlet brought 60% of people with new insomnia into remission within a month, compared with 15% of people who waited¹¹.
• If sleepless nights come with hopelessness or thoughts of suicide, call or text 988 to reach the 988 Suicide & Crisis Lifeline at any hour¹³.

For one year, 1,248 people who slept well filled out an online sleep diary every day¹. All were 35 or older, and they came from across the United States¹.

A team led by sleep researcher Michael Perlis used those daily records to spot new insomnia as it began, and to see what happened next¹.

Insomnia showed up often. Over the year, 27% of the group had a bout of acute, or short-term, insomnia¹. That meant poor sleep at least three nights a week, lasting two to 12 weeks¹.

Then most of it faded. About 72% of those people got their good sleep back, and about 19% kept sleeping poorly without crossing into a disorder¹. Only 23 people, under 2% of the whole group, developed chronic insomnia¹. The study appeared in the journal Sleep in 2020¹.

So a stressful stretch often brings bad nights, and that’s normal. The real question is why a few people get stuck. Researchers point to two answers: a trait called sleep reactivity, which you can’t fully choose, and what you do in the first few weeks, which you can.

A stressed brain is built to stay alert

Short-term insomnia usually lasts days or weeks, according to MedlinePlus, the National Library of Medicine’s health site². Stress at work, family pressure and traumatic events are common causes². The National Heart, Lung, and Blood Institute (NHLBI) adds worry about relationships, money and the death of a loved one to the list³.

Shared crises show the pattern. A 2022 review pooled 250 studies with about 493,000 people in 49 countries during the COVID-19 pandemic⁴. About 4 in 10 reported a sleep problem⁴. The rate ran higher during lockdowns, about 42%, than without them, about 38%⁴.

Why does stress keep you up? Many sleep scientists use the idea of hyperarousal, meaning the body and mind stay switched on when they should power down. Researchers have looked for it in stress hormones such as cortisol, in heart rate and blood pressure, and in fast brain waves before sleep⁵.

The results are mixed. In a 2018 review, David Kalmbach, Christopher Drake and colleagues called the findings inconsistent, and in some studies resting measures looked similar until people faced a stressor⁵. They suggested the key problem may be how hard the system reacts to stress, not a constant state of alarm⁵.

That framing fits a natural-health view of the body. A wakeful night before a hard day doesn’t mean something is broken. It’s an alarm system doing its job, sometimes too well. Our article on the stress response explains the hormones involved.

Some people’s sleep breaks more easily under stress

Give two people the same awful week, and one may sleep fine while the other lies awake. Researchers call the difference sleep reactivity: how much stress, a schedule change or a substance like caffeine disrupts a person’s sleep⁵⁶.

It acts like a trait, staying fairly steady across different stressors and over time⁵. Part of it seems inherited. Twin and sibling studies put its heritability at roughly 29% to 37%, and women tend to be more reactive than men⁵.

Most studies measure it with the Ford Insomnia Response to Stress Test, or FIRST⁶, first published by Drake and colleagues in 2004⁷. It lists nine common stressful situations, some coming up and some just past, and asks how likely each would be to disturb your sleep⁷. Each answer is scored from 1 to 4, for a total of 9 to 36, and higher totals mean more fragile sleep⁷. We describe the scale rather than print it; a sleep clinician can give it to you.

The score predicts trouble. Kalmbach’s team followed 2,892 adults who had never had insomnia or depression⁸. People who scored 18 or higher had about 3.3 times the odds of developing insomnia a year later⁸. The score predicted insomnia better than whether a person’s mother had it⁸.

Among people who did develop insomnia, those at or above a cutoff of 16 took about 65 minutes to fall asleep, compared with 37 minutes for the rest⁸. A high score isn’t a diagnosis or a sentence. It flags whose sleep needs protecting when life gets hard.

One disclosure: in the 2018 review, Drake listed research funding from Merck, Eisai, Jazz, Teva and others, plus Merck speaking work; Kalmbach listed Merck research funding⁵.

The 3P model shows how a rough patch gets locked in

A 1987 paper by Spielman, Caruso and Glovinsky laid out a simple map of how insomnia starts and stays⁹. It’s called the 3P model, for three kinds of factors⁷⁹:

• Predisposing factors are what you bring. They include a tendency toward hyperarousal, a habit of worrying or brooding, and life setups such as raising small children⁹. Sleep reactivity, a built-in vulnerability, belongs here too⁷.
• Precipitating factors are the trigger, mostly life stress and medical or mental illness⁹.
• Perpetuating factors keep insomnia going after the trigger fades. The main one is what researchers call sleep extension: going to bed earlier, getting up later and napping⁹.

This is the cruel part. Those habits feel sensible, and they bring some short-term relief⁹. But extra time in bed weakens the body’s drive for sleep, so the next night starts with less sleep pressure⁹. Our article on sleep pressure explains how that drive builds.

A second trap may be learned. After weeks of tossing and turning, the bed itself can become a cue for being awake⁹. Researchers call this conditioned arousal, though Perlis and colleagues noted in 2011 that no forward-looking study had yet confirmed it⁹. NHLBI adds that worrying about sleep and watching the clock can make insomnia worse³.

Picture a nurse whose father lands in the hospital. She sleeps badly for a week; that’s the trigger. To make up for it, she heads to bed at 9 and naps on her days off. Her father recovers, but her sleep doesn’t, because the habits she built to cope now run the show.

How often a bad patch turns chronic depends on how you count

Even the line between short-term and chronic varies. NHLBI calls insomnia chronic at three or more nights a week for three months or longer³. MedlinePlus draws the line at a month².

In 2012, Jason Ellis of Northumbria University and colleagues published some of the first estimates for acute insomnia¹⁰. In an American online panel of 2,861 adults, 9.5% had it, as did 7.9% of 1,095 people interviewed by phone in Britain¹⁰. They estimated that 31% to 37% of the British group would have a bout within a year¹⁰.

Their first estimate of how many bouts turned chronic was about 21%¹⁰. But that figure rested on just 14 people, and the authors called it tentative¹⁰. In the larger 2020 diary study, 23 of the 337 people with a bout went on to chronic insomnia¹. By our math, that’s about 7%.

The studies differ in size and method, but they agree on the big picture: most people recover, and a minority get stuck.

One early therapy session helped most people in a small trial

Cognitive behavioral therapy for insomnia, or CBT-I, is the first-choice treatment for chronic insomnia. Our CBT-I article covers the full program. In 2015, Ellis’s team asked whether a much smaller dose, given early, could help¹¹.

They recruited 40 adults whose insomnia had lasted less than three months and who weren’t taking sleep medicine¹¹. Half got one session of about an hour, one-on-one with Ellis, plus a self-help pamphlet. The other half went on a waiting list¹¹.

The session covered how sleep needs differ from person to person, and it set a tighter time-in-bed window based on each person’s one-week sleep diary¹¹. The pamphlet had a three-part message: detect, by keeping a diary; detach, by controlling the cues that disrupt sleep; and distract, by using thought-control and imagery techniques¹¹.

One month later, 60% of the treated group were in remission, compared with 15% of the waiting group¹¹. In its news release, the university said 73% of treated people reported better sleep within three months, and 70% of the waiting group asked for the treatment¹¹.

Keep the limits in view. The trial was tiny and the comparison group got nothing. The same team’s later pilot of 28 people found group sessions worked about as well as one-on-one¹⁴, but as of October 2026 we found no large independent replication.

Treating sleep early may help you weather the next storm

The COVID-19 pandemic gave researchers an unplanned test. In 2016 and 2017, a team at Henry Ford Health had measured sleep reactivity in 208 people with insomnia who joined a trial of an online, self-guided CBT-I program or sleep education¹².

That program was Sleepio, a commercial app. A 2018 report on the trial said the company supplied it free and the Robert Wood Johnson Foundation paid for the research¹².

In April 2020, as the pandemic took hold, the team asked the same people about stress reactions and depression¹². People with higher reactivity years earlier had more of both¹². The high-reactivity group had more than twice the odds of clinically significant stress reactions and depression¹².

There was a hopeful twist. Among people who had gotten the online CBT-I years before, the link between reactivity and stress reactions was weaker, though the link to depression was not¹².

The same Henry Ford group surveyed the field in 2023. In their reading, talk-based insomnia care calms sleep reactivity best when it starts while insomnia is still new⁶. They also flagged early, still-thin signs that people whose sleep reacts strongly before a trauma fare worse afterward, with more depression and post-traumatic stress disorder (PTSD)⁶.

There’s a caution, too. The 2018 review noted that reactivity often stays high even after insomnia goes away⁵. Think of it as a sensitivity to manage, not a switch you flip once.

Your rough-patch sleep plan for the first two weeks

This plan works with your body’s own drive for sleep rather than overriding it. It costs nothing and uses no pills. It’s our own design, built from the 3P model⁹, the three-part pamphlet in Ellis’s trial¹¹ and federal health advice²³. It hasn’t been tested as a package.

When	What to do	Why
Day 1	Start a simple diary: bedtime, wake time, naps, caffeine, alcohol and how you felt by day	NHLBI suggests one to two weeks of records3
Every morning	Get up at your usual time, even after a bad night	Sleeping in weakens the next night’s sleep drive9; our sleep schedule article explains more
Every evening	Don’t go to bed early to “bank” rest	Sleep extension is the main habit that keeps insomnia going9
Daytime	Skip naps, or keep one short and before midafternoon (our suggestion)	Napping is a sleep extension habit9
Early evening	Write down worries and one next step for each	Our nighttime anxiety article covers tested worry tools
Evening	Skip alcohol close to bedtime and limit caffeine	Both raise the risk of sleep problems23
At night	Turn the clock away and keep your phone out of reach	Clock-watching can worsen insomnia3
At night	If you’re wide awake and tense, get up, do something calm in dim light and return when sleepy	Keeps the bed from becoming a cue for being awake9; our CBT-I article explains
Day 7	Review your diary: count bad nights and note what helps	Shows your trend, not just last night
Day 14	Take the check below	Decide whether to get help

Two things to skip. Don’t reach for a drugstore sleep aid as a nightly fix: the American Academy of Sleep Medicine (AASM) suggests against the antihistamine diphenhydramine for chronic insomnia¹⁵. Our sleep-aid article explains the cautions. And don’t drive when you’re drowsy, since insomnia can leave you sleepy by day².

What the evidence shows

Claim	Evidence level	What it rests on
Short bouts of insomnia after stress are common and usually fade	Strong evidence	A year-long daily diary study and federal health guidance12
People with high sleep reactivity are more likely to develop insomnia later	Strong evidence of a link	Consistent results from several large studies that followed people forward in time; a score flags risk but doesn’t diagnose or prove cause568
Insomnia means a body that is always on alert	Promising but early	Resting stress markers give mixed results5
Sleeping in, early bedtimes and naps keep insomnia going	Promising but early	Central to the 3P model; the learned-arousal piece is unconfirmed9
One CBT-I session early can stop a bout from turning chronic	Promising but early	One 40-person trial with a waiting-list group11
Earlier online CBT-I buffers later stress reactions	Promising but early	A follow-up analysis of one trial12
Diphenhydramine treats chronic insomnia	Evidence says no, or unsafe	The AASM suggests against it, a weak recommendation15

When to get help

Talk with a clinician if:

• poor sleep is getting in the way of your daily life, NHLBI’s signal to talk to your doctor³;
• trouble sleeping is severe or distressing and has lasted two weeks or more, especially with appetite changes, trouble getting out of bed because of mood, trouble concentrating, loss of interest or irritability, signs the National Institute of Mental Health (NIMH) says call for professional help¹³;
• you can’t do your usual tasks and activities, another sign on NIMH’s list¹³.

Our articles on nighttime anxiety and on trauma cover nightmares that keep returning after a frightening event. Our article on when to see a sleep specialist covers snoring, breathing pauses and other signs of a different sleep problem.

If sleeplessness comes with hopelessness or thoughts of suicide, call or text 988 to reach the 988 Suicide & Crisis Lifeline, free and confidential, at any hour¹³. If a life is in danger, call 911¹³.

Questions readers ask

The bottom line

A rough night after a hard day is your body’s alarm system at work, and most stress-related insomnia fades within weeks. Some people’s sleep is more reactive to stress, partly by inheritance, and that raises the odds of getting stuck.

What you do next matters. Keep your wake time, resist the urge to make up sleep in bed, write worries down early and watch the trend over two weeks. If bad nights keep coming, ask about CBT-I early; a short course may be all you need.

Related reading

• Doctors’ first choice for insomnia is retraining your sleep with CBT-I
• Worry gets louder at 3 a.m., and a few tested tricks can turn it down
• Most sleep trouble fades with time, and these signs need a specialist
• The sleep aid with the clearest warning is the drugstore antihistamine
• The stress response saves you in minutes, and viral cortisol fixes misread it

Sources

1. Perlis ML, Vargas I, Ellis JG, Grandner MA, Morales KH, Gencarelli A, Khader W, Kloss JD, Gooneratne NS, Thase ME. “The natural history of insomnia: The incidence of acute insomnia and subsequent progression to chronic insomnia or recovery in good sleeper subjects.” Sleep, 2020;43(6) (University of Arizona record). experts.arizona.edu
2. MedlinePlus. “Insomnia.” National Library of Medicine, updated September 13, 2024. medlineplus.gov
3. National Heart, Lung, and Blood Institute. “Insomnia: Causes and Risk Factors” and “Insomnia: Diagnosis.” NIH, updated March 24, 2022. nhlbi.nih.gov ; nhlbi.nih.gov
4. Jahrami HA, Alhaj OA, Humood AM, et al. “Sleep disturbances during the COVID-19 pandemic: A systematic review, meta-analysis, and meta-regression.” Sleep Medicine Reviews, 2022;62:101591 (EM-Consulte abstract). em-consulte.com
5. Kalmbach DA, Cuamatzi-Castelan AS, Tonnu CV, Tran KM, Anderson JR, Roth T, Drake CL. “Hyperarousal and sleep reactivity in insomnia: current insights.” Nature and Science of Sleep, 2018;10:193-201. dovepress.com
6. Reffi AN, Kalmbach DA, Cheng P, Drake CL. “The sleep response to stress: how sleep reactivity can help us prevent insomnia and promote resilience to trauma.” Journal of Sleep Research, 2023;32(6):e13892 (Henry Ford Health record). scholarlycommons.henryford.com
7. Chang J, Suh S. “Validation of the Korean Ford Insomnia Response to Stress Test Questionnaire.” Sleep Medicine Research, 2018;9(2):92-96. sleepmedres.org
8. Kalmbach DA, Pillai V, Arnedt JT, Drake CL. “Identifying At-Risk Individuals for Insomnia Using the Ford Insomnia Response to Stress Test.” Sleep, 2016;39(2):449-456 (Henry Ford Health record). scholarlycommons.henryford.com
9. Perlis M, Gehrman P, Ellis J. “The Natural History of Insomnia: What We Know, Don’t Know, and Need to Know.” Sleep Medicine Research, 2011;2:79-88 (University of Pennsylvania copy). med.upenn.edu
10. Ellis JG, Perlis ML, Neale LF, Espie CA, Bastien CH. “The natural history of insomnia: focus on prevalence and incidence of acute insomnia.” Journal of Psychiatric Research, 2012 (University of Pennsylvania copy). med.upenn.edu
11. Ellis JG, Cushing T, Germain A. “Treating Acute Insomnia: A Randomized Controlled Trial of a ‘Single-Shot’ of Cognitive Behavioral Therapy for Insomnia.” Sleep, 2015;38(6):971-978. Abstract via Northumbria Research Link: pubmed.ncbi.nlm.nih.gov ; university news release via ScienceDaily, June 1, 2015: sciencedaily.com
12. Reffi AN, Drake CL, Kalmbach DA, Jovanovic T, Norrholm SD, Roth T, Casement MD, Cheng P. “Pre-pandemic sleep reactivity prospectively predicts distress during the COVID-19 pandemic: The protective effect of insomnia treatment.” Journal of Sleep Research, 2023;32(1):e13709 (Henry Ford Health record). scholarlycommons.henryford.com ; program and funding details: Sleep Review interview with Anthony Reffi, January 24, 2023, sleepreviewmag.com , and MDedge, “App tied to reducing insomnia, depression in adults,” August 15, 2018, mdedge.com
13. National Institute of Mental Health. “Caring for Your Mental Health.” NIH, reviewed April 2026. nimh.nih.gov
14. Boullin P, Ellwood C, Ellis JG. “Group vs. Individual Treatment for Acute Insomnia: A Pilot Study Evaluating a ‘One-Shot’ Treatment Strategy.” Brain Sciences, 2017;7(1):1 (DOAJ record). pubmed.ncbi.nlm.nih.gov
15. American Academy of Sleep Medicine. “Clinical Practice Guideline for the Pharmacologic Treatment of Chronic Insomnia in Adults: Guideline at a Glance” (Sateia MJ, et al., Journal of Clinical Sleep Medicine, 2017;13(2):307-349). aasm.org