Why do I have nightmares every night? In adults the usual links are trauma, anxiety, depression and insomnia symptoms, and some medicines, and nightmares that happen most nights and cause distress are called nightmare disorder, which affects about 4% of adults. Imagery rehearsal therapy is the treatment the American Academy of Sleep Medicine recommends for nightmare disorder, and a meta-analysis of 13 studies found large effects on nightmare frequency that lasted 6 to 12 months. Prescription treatment exists, but the evidence is mixed: a 304-person trial in veterans found prazosin no better than placebo for distressing dreams, while a meta-analysis of 15 studies found both prazosin and imagery rehearsal helped. In a Hong Kong study of 230 adults, two thirds of those with probable nightmare disorder still had it 6 months later, so it is worth getting help.
Why do I have nightmares every night? That is the question that gets asked at 4 a.m. with the light on, and the useful answer starts with a distinction. One bad dream after a stressful week is ordinary. Nightmares on most nights, so vivid that you wake up and remember them and so frightening that you dread bedtime, are a pattern that researchers have studied and that has treatments.
This page covers how common that pattern is, what is linked to it, what the medicine and therapy trials found, and when to see a doctor. It describes what the studies found and does not tell you what to take.
Why do I have nightmares every night? How common frequent ones are
The numbers on frequent nightmares adults report in surveys are lower than most people guess. Eight Finnish population surveys between 1972 and 2007, covering 69,813 people aged 25 to 74, found that 3.5% of men and 4.8% of women reported frequent nightmares. Occasional nightmares became about 20% more common over the period for both sexes, and they rose with age, especially in men. People with war experience reported more frequent nightmares, along with more symptoms of insomnia, depression and anxiety, even decades later.
Sandman N, Valli K, Kronholm E, et al. Nightmares: Prevalence among the Finnish General Adult Population and War Veterans during 1972-2007. Sleep 2013. PMID 23814341
The American Academy of Sleep Medicine's position paper puts nightmare disorder, the clinical version, at approximately 4% of adults. It occurs alone or as part of other disorders such as PTSD and can impair quality of life significantly. Put differently: nightmares every night are unusual, but a few percent of adults live with them, and you are not strange for asking.
Morgenthaler TI, Auerbach S, Casey KR, et al. Position Paper for the Treatment of Nightmare Disorder in Adults: An American Academy of Sleep Medicine Position Paper. J Clin Sleep Med 2018. PMID 29852917
What sits behind nightly nightmares
Three groups of causes show up in the research, and more than one often applies.
Trauma and mental health. In a prospective study of 230 Hong Kong Chinese adults assessed twice, six months apart, people with probable nightmare disorder at baseline were much more likely to screen positive for PTSD (82.1% against 18.3%) and used more mental health services. Higher nightmare severity at baseline predicted worse self-rated mental health and self-esteem and more PTSD symptoms later. The authors suggest that nightmare symptoms may help identify post-traumatic stress. The Finnish survey above links frequent nightmares to insomnia, depression and anxiety symptoms as well. This is correlation, and it runs both ways: bad sleep feeds anxiety, and anxiety feeds bad sleep.
Lam SKK, Cheung CTY, Wang EKS, et al. A prospective study of nightmare disorder among Chinese adults in Hong Kong: Persistence and mental health outcomes. Behav Sleep Med 2024. PMID 38369868
Medicines. A review of case reports and clinical trials found that agents acting on the neurotransmitters norepinephrine, serotonin and dopamine are clearly associated with patients' reports of nightmares, and that drugs affecting the immune response to infection are likely to cause them in some patients. If the nightmares began around the time you started or changed a medicine, say so to the prescriber; do not stop it yourself. The sleep side effects of common medicines are listed in Medications that cause insomnia.
Pagel JF, Helfter P. Drug induced nightmares--an etiology based review. Hum Psychopharmacol 2003. PMID 12532316
Sleep itself. A nightmare that wakes you is also a night of broken sleep, which is a problem in its own right (see Sleep fragmentation). The article Vivid dreams explains how REM sleep and dream intensity work, and Waking up with anxiety covers the stage after the dream, when the heart is still racing.
Recall is part of the picture too. In 393 people undergoing clinical polysomnography (mean apnea-hypopnea index 34.9), those with a higher index reported fewer nightmares, and the authors conclude that significant sleep apnea suppresses nightmare recall, possibly through the REM suppression that apnea causes. So what people report is a mix of what they dream and what they remember on waking.
Pagel JF, Kwiatkowski C. The nightmares of sleep apnea: nightmare frequency declines with increasing apnea hypopnea index. J Clin Sleep Med 2010. PMID 20191941
One caution on the words "every night". Memory can distort it: after waking from one nightmare and lying awake for hours, it can feel like a night of nightmares, and the nights you remember nothing may still contain dreams. A seven-night log is a better test than a feeling.
Why do I keep on having nightmares? And why am I having nightmares now?
Those are two different questions. "Why am I having nightmares now?" is about a start: look at the two to four weeks before the first one for a frightening or stressful event, a new or changed medicine, a spell of short or broken sleep, or a change in alcohol. "Why do I keep on having nightmares?" is about persistence, and here the Hong Kong follow-up above is the best data: two thirds of the people with probable nightmare disorder still met the criteria six months later, and higher nightmare severity at the start predicted worse mental health and more post-traumatic stress symptoms afterwards. Nightmares that persist are a pattern with its own treatment, which is why a few weeks of them is a reason to ask for help rather than to wait.
When bad dreams become nightmare disorder
Nightmare disorder means repeated nightmares that you remember clearly, that wake you, and that cause distress or trouble in the day. It is not rare and it is not always short-lived. In the Hong Kong study, 66.7% of those with probable nightmare disorder at baseline still met the diagnostic criteria at follow-up, which the authors describe as the first empirical data showing persistence. The disorder was associated not just with PTSD symptoms but with a broader range of mental health problems.
This is also the point to tell apart three things people lump together. A nightmare wakes you with a clear memory. A night terror is a partial arousal with a scream and little memory. And acting out dreams, including punching or shouting in your sleep, can be REM sleep behavior disorder, which needs a different assessment.
Imagery rehearsal and other therapy for frequent nightmares
The American Academy of Sleep Medicine's 2018 position paper recommends imagery rehearsal therapy for PTSD-associated nightmares and for nightmare disorder. In this approach a therapist helps you write down a recurring nightmare, change it in whatever way you like, and rehearse the new version while awake. The paper says several other therapies may be used for nightmare disorder, including cognitive behavioral therapy, exposure, relaxation and rescripting therapy, hypnosis and lucid dreaming therapy, and for PTSD-associated nightmares also CBT for insomnia and eye movement desensitization and reprocessing. A "may be used" position means, in the paper's own words, that the evidence or expert consensus is less clear.
A meta-analysis of imagery rehearsal for post-trauma nightmares pooled 13 studies. It found large effects on nightmare frequency, sleep quality and PTSD symptoms from before to after treatment, sustained at 6 to 12 months of follow-up. Combining it with CBT for insomnia improved sleep quality more than imagery rehearsal alone. The authors also note that effect sizes were small in the single study that had an active-treatment control, so some of the large effect is attention and expectation.
Casement MD, Swanson LM. A meta-analysis of imagery rehearsal for post-trauma nightmares: effects on nightmare frequency, sleep quality, and posttraumatic stress. Clin Psychol Rev 2012. PMID 22819998
For the lucid dreaming route, the evidence is smaller but real: Lucid dreaming methods includes a systematic review of lucid dreaming therapy for nightmares.
How to get rid of bad dreams and nightmares: what imagery rehearsal involves
Bad dreams that come now and then need nothing. For nightmares that repeat, the search "nightmares treatments" has one best-documented answer, and it is not a pill. Imagery rehearsal therapy is a form of cognitive restructuring: the core of the approach is changing the nightmare script and imagining the new version repeatedly while awake. It is usually done with a therapist, over a few sessions, and it works on the scenes of the dream itself.
Two studies show what that looks like in practice. In a German study of a manualized version, 69 people took part in three groups: 22 whose main problem was nightmares, 21 with major depression and nightmares, and 26 with post-traumatic stress and nightmares (12 of them randomly assigned to a control condition). Nightmare frequency fell in all groups after treatment. Anxiety during the nightmares fell least in the post-traumatic stress group, while the people whose main problem was nightmares benefited most and kept low anxiety up to the follow-up. In an earlier before-and-after study, 12 people with chronic nightmares had one imagery rehearsal session and were re-assessed 8.5 weeks later: retrospective nightmare frequency fell (effect size d = 1.06), so did the frequency of prospective bad dreams (d = 0.53) and anxiety (d = 1.01), while sleep recorded in the laboratory changed little.
Thünker J, Pietrowsky R. Effectiveness of a manualized imagery rehearsal therapy for patients suffering from nightmare disorders with and without a comorbidity of depression or PTSD. Behav Res Ther 2012. PMID 22738908
Germain A, Nielsen T. Impact of imagery rehearsal treatment on distressing dreams, psychological distress, and sleep parameters in nightmare patients. Behav Sleep Med 2003. PMID 15600218
Both are small and the second had no comparison group, so they are best read as showing what the treatment looks like and who might benefit, with the meta-analysis above giving the stronger numbers. If you are on a waiting list or still choosing, the seven-night log described below is the thing a therapist will ask for first.
Medicine for nightmares: what exists and why the evidence is mixed
Medicine for nightmares exists, and the best-known prescription option is prazosin. The history shows why it is hard to give a simple answer. The AASM's 2010 best practice guide recommended prazosin for PTSD-associated nightmares at the top evidence level (Level A).
Aurora RN, Zak RS, Auerbach SH, et al. Best practice guide for the treatment of nightmare disorder in adults. J Clin Sleep Med 2010. PMID 20726290
Then a large trial came in. Three hundred and four military veterans with chronic PTSD and frequent nightmares were randomized to prazosin or placebo for 26 weeks. At 10 weeks there was no significant difference in the change in the item on recurrent distressing dreams (between-group difference 0.2, 95% CI -0.3 to 0.8), in sleep quality, or in the clinician's global impression, and the differences were still absent at 26 weeks.
Raskind MA, Peskind ER, Chow B, et al. Trial of Prazosin for Post-Traumatic Stress Disorder in Military Veterans. N Engl J Med 2018. PMID 29414272
The 2018 position paper moved prazosin to the "may be used" list. A later meta-analysis argued that this was premature. It pooled 8 imagery rehearsal studies and 7 prazosin studies (1,078 people) and found moderate to large effects for prazosin on nightmare frequency (g = 0.61) and small to moderate effects for imagery rehearsal (g = 0.51), with no significant difference between them. So the position is neither "it works" nor "it fails": the evidence is split, and the same position paper lists some medicines as not recommended for nightmare disorder (clonazepam and venlafaxine). The choice belongs with a doctor who knows your history, other medicines and blood pressure.
Yücel DE, van Emmerik AAP, Souama C, et al. Comparative efficacy of imagery rehearsal therapy and prazosin in the treatment of trauma-related nightmares in adults: A meta-analysis of randomized controlled trials. Sleep Med Rev 2020. PMID 31855732
What to do this week
Three small steps are worth taking before an appointment. First, keep a log for seven nights: the time you woke, a line about the dream, how long it took to fall asleep again and anything unusual about the day (alcohol, a new medicine, a stressful event, a late meal). Second, if a medicine was started or changed around the time the nightmares began, write the name and date down for the prescriber. Third, ask about imagery rehearsal therapy by name when you see a doctor, since it is the treatment with the strongest recommendation and it does not involve a prescription.
If a particular nightmare keeps returning, you will notice that the log has the same few scenes in it. That is useful, because imagery rehearsal works on exactly those scenes. If the nightmares are tied to a memory of something that happened, a therapist trained in trauma care is the right person to do it with, not a self-help attempt.
See a doctor if the nightmares come most nights for several weeks, started after a frightening event or a new medicine, make you dread sleep, or come with thoughts of harming yourself. Do the same if you shout, hit out or leave the bed during them and risk an injury.
What a week of tracking can and cannot show
SleepTrace cannot see dreams and cannot tell whether a wake-up was a nightmare. What the app does is listen: it estimates sleep phases from sound, labels snoring, talking and coughing and keeps clips of them (the free plan plays back 3 clips a month), and marks apparent breathing pauses with a timestamp. For nightmares that gives you two limited things. The timeline shows how many times you woke and at what hour, and if you shout or talk during an episode a partner or doctor can hear the clip instead of relying on memory. Other sounds may not be labeled, so do not expect every cry to appear. It works on iPhone and Android; the app stays open and dims its screen, and the phone should be plugged in. Phases are estimates, and the sleep apnea indicator is a screening estimate, not a diagnosis. If nightmares come with loud snoring or breathing pauses a partner notices, mention that to a doctor too.
Frequently asked questions
Occasional nightmares are common, but nightmares most nights are not typical. In a Finnish survey of 69,813 adults aged 25 to 74, 3.5% of men and 4.8% of women reported frequent nightmares. When they come often, feel intense and affect your days, the pattern is called nightmare disorder, which the American Academy of Sleep Medicine puts at about 4% of adults.
The best-documented links are trauma and post-traumatic stress, anxiety, depression and insomnia symptoms, and some medicines. In a 230-person Hong Kong study, 82.1% of people with probable nightmare disorder screened positive for PTSD against 18.3% of the others. A review of drug-induced nightmares linked medicines that act on norepinephrine, serotonin and dopamine to nightmare reports.
Prescription treatment exists, and prazosin is the best known, but the evidence is mixed. In a trial of 304 veterans with PTSD, prazosin did not reduce distressing dreams more than placebo over 10 weeks, while a meta-analysis of seven prazosin studies found a moderate to large effect on nightmare frequency (g = 0.61). Whether it is right for you is a decision for a doctor, and you should not start or stop any medicine on your own.
Yes. The American Academy of Sleep Medicine recommends imagery rehearsal therapy for nightmare disorder, and a meta-analysis of 13 studies in people with post-trauma nightmares found large effects on nightmare frequency, sleep quality and PTSD symptoms that were sustained at 6 to 12 months. The effect was small in the single study that used an active-treatment comparison.
If they come most nights for more than a few weeks, follow a frightening event, leave you afraid to sleep, start soon after a new medicine, come with thoughts of harming yourself, or you act them out and hurt yourself or your partner. Nightmares can persist: two thirds of those with probable nightmare disorder still met the criteria 6 months later.
SleepTrace is a wellness app, not a medical device. This article is general information, not medical advice. If your symptoms are frequent, severe or worrying, please talk to a doctor.
Nightmares every night deserve attention from a doctor or therapist, and a clear picture of your nights helps that conversation. SleepTrace records sound only and shows estimated sleep phases, wake periods, talking clips and snoring, so you can see whether the nights were fragmented. It does not detect dreams, and it is not treatment for nightmare disorder.
Hear your own night. SleepTrace turns a night of audio into your sleep phases, the sounds you made, and how it all trends. Works without a wearable, better with one. Your phone on the nightstand is enough to start. Get it for iPhone or Android →