How to Stop Nightmares: Causes & Treatments for Adults
Most adults who keep waking from nightmares can cut how often they happen within a few weeks, and the fixes are more straightforward than you'd think. Around 2% to 5% of adults have nightmares at least once a week, so if that's you, you're in a well-studied group, not a strange one.
The best-evidenced treatment, imagery rehearsal therapy, roughly halves nightmare frequency for most people who try it properly. This guide covers what counts as a nightmare, why adults get them, the exact technique that works, and when to get your GP involved.
๐ Key Takeaways
- Weekly nightmares affect 2-5% of adults - you're not alone, and the problem is usually treatable in weeks, not years
- Stress, anxiety, alcohol, and some medicines are the common triggers - fix those and many nightmares stop on their own
- Imagery rehearsal therapy is the best-studied fix - rewrite the dream while awake and practise the new version for one to two weeks
- See your GP if nightmares happen most nights, keep you afraid of going to bed, or started after a traumatic event
๐ Suggested Reading: Sleep and Anxiety: What Actually Helps ยท Why Do We Dream? What Science Knows
What Counts as a Nightmare (and What Doesn't)
Nightmares are vivid, disturbing dreams that wake you up, usually during REM sleep in the second half of the night. You remember them, you feel scared or upset, and you're fully alert once you're awake. That last part matters, because it separates a nightmare from a night terror.
Night terrors happen in deep non-REM sleep, early in the night. Someone having one might sit up, shout, or thrash around while still asleep, and they rarely remember it the next morning. Night terrors mostly affect children, but adults can have them too, and the NHS treats both as sleep problems worth understanding rather than ignoring (NHS: night terrors and nightmares).
One more distinction worth making: a bad dream that you don't wake from isn't a nightmare in the medical sense, even if it leaves you unsettled when your alarm goes off. The clinical definition centres on waking up from the dream itself. If you're waking regularly, that's when the techniques below start to matter.
Why Do Adults Get Nightmares?
The most common trigger is stress. A hard period at work, money worries, or a relationship strain all show up in dream content, because REM sleep is when your brain processes the emotional residue of the day. If you're also lying there anxious about not sleeping, that's a double loop: anxiety disturbs sleep, and disturbed sleep gives you more vivid dreams (our anxiety and sleep guide covers this cycle in detail).
Trauma is the heaviest trigger of all. Studies put nightmare rates among people with PTSD at up to 71% to 72%, compared with around 2% to 5% in the general population (PMC: management of nightmares in PTSD; PMC: nightmare frequency in trauma survivors). If your nightmares started after a specific event and keep replaying it, that's a signal to get professional help rather than self-managing.
Alcohol is a quieter but common trigger. It suppresses REM sleep in the first half of the night, and as it wears off your brain rebounds into more intense REM later on, which is exactly when nightmares surface. The same rebound effect can happen after certain prescription medicines, including some antidepressants and blood pressure drugs, where vivid dreams and nightmares are listed side effects.
Sleep deprivation and irregular schedules make everything worse. When you finally sleep after being run down, your brain rushes into REM to catch up, and that rebound REM tends to be more intense and more emotional. Fever and illness do the same thing, which is why kids (and adults) often report strange dreams when they're poorly.
When Nightmares Stop Being Normal
Occasional nightmares are normal at any age, full stop. It becomes nightmare disorder when they happen often, cause real distress, or start affecting your daytime life, like making you afraid of going to bed or leaving you exhausted and irritable.
The distinction matters because nightmare disorder is a recognised condition with a named treatment, not something you just have to put up with. In the UK, the NHS can offer cognitive behavioural therapy for frequent nightmares, and the research consistently shows it works (NHS: treatment for night terrors and nightmares).
If your nightmares follow a traumatic event, trauma-focused psychological therapy is the route most likely to help, and the evidence base for it is strong. Around 71% of trauma survivors with PTSD report frequent nightmares, which means you're not an unusual case, and it also means clinicians see this constantly and know how to treat it.
How to Stop Nightmares Tonight
Before you reach for any treatment, these four steps deal with the everyday triggers, and they cost nothing:
1. Hold your sleep schedule steady, even at weekends. Go to bed and get up at the same time seven days a week, within about 30 minutes. Irregular sleep causes REM rebound, and rebound REM is where vivid dreams live. If you need a framework for the rest of the day, our wind-down routine guide walks through the evening half.
2. Cut alcohol in the evening hours. If you drink, keep it earlier and lighter. A drink at dinner is a very different thing from a nightcap, and the nightcap is the one that buys you the 3am REM rebound.
3. Stop replaying the nightmare when you wake. Lying in the dark re-running the scary scene trains your brain to expect it. Get up, go to the loo, have a sip of water, and do something boring for ten minutes before getting back in. Our guide to falling back asleep fast has the full technique.
4. Write it down in the morning. Not to dwell on it, but to give your brain a chance to file it away in daylight, when the threat system is quiet. This is also the first step of the treatment below, so you're building a useful habit either way.
Imagery Rehearsal Therapy: the Fix With the Most Evidence
Imagery rehearsal therapy (IRT) is the best-studied treatment for recurring nightmares, and you can do the core of it yourself. The logic is simple: your brain treats mental images as rehearsals, so if you rehearse a changed version of the dream during the day, the old script loses its grip at night.
The technique, in three steps:
1. Write the nightmare down in as much detail as you can remember. Keep it factual, like a report.
2. Rewrite the ending (or the whole dream) so it becomes neutral or positive. It doesn't need to be realistic, it needs to be something your brain can picture without fear. The classic example is the monster that turns into a neighbour's cat.
3. Practise the new version for 10 to 20 minutes a day, usually in the morning or early evening, picturing it as vividly as you can. Most people see a real drop in nightmare frequency within one to two weeks.
The evidence behind it goes back decades. The original trial of imagery rehearsal treatment in chronic nightmare sufferers showed large reductions in nightmare frequency after a single therapy session plus home practice (PubMed: imagery rehearsal treatment for chronic nightmares). A 2022 study found that pairing IRT with a sound cue played during sleep made the effects even stronger (PubMed: enhancing IRT with targeted memory reactivation), and a 2025 review still lists IRT among the most supported interventions for nightmare disorder (PubMed: status of IRT and other interventions).
If you'd like the wider picture on what dreams are for and why REM sleep matters, our guide to why we dream gives the neuroscience background, and our sleep paralysis explainer covers the other sleep experience people often confuse with nightmares.
Products That Can Help You Sleep Through the Night
Products don't cure nightmares, and anyone who tells you otherwise is selling something. But they can do two genuinely useful jobs: helping you fall asleep faster when anxiety is high, and stopping small wake-ups that drop you into a lighter, dream-heavy sleep. These are the ones that earn their place:
A weighted blanket uses deep pressure to calm the nervous system, which is why it's a popular tool for anxiety-linked sleep problems. The Good Nite Weighted Blanket (9kg) is the UK bestseller for a reason: the weight sits evenly and the cover is removable for washing, which matters when you're using it every night. If you're between sizes or want a softer feel, the Silentnight Weighted Blanket comes in more weights and is a common first purchase. Our weighted blanket roundup has the full comparison.
A white noise machine masks the small sounds, the car outside, a partner turning over, that rouse you into the light sleep where dreams get vivid. The Dreamegg D11 is compact, USB powered, and simple enough to leave on all night, and it's the machine we recommend most often for adults. If you want more sounds for less money, the Magicteam with 40 sounds is the best-reviewed budget pick in the UK. See the best white noise machines UK for the rest of the shortlist.
A silk sleep mask blocks the light that leaks in during summer dawns and nudges you toward wakefulness. The OLESILK Sleep Mask is 19-momme mulberry silk, which stays cool and doesn't drag on your skin, and it's one of the best-reviewed masks on Amazon UK. More options in our sleep mask guide.
Blackout curtains do the same job for the whole room. The Deconovo Blackout Curtains are thermal-backed, so they also keep the bedroom a couple of degrees cooler in summer, and they're the value pick we keep coming back to.
When to See a GP About Nightmares
Book an appointment if nightmares happen most nights, if they keep you afraid of going to bed, or if they started after a traumatic event. Also go if they're making you exhausted during the day or you're having them alongside other sleep symptoms like loud snoring or gasping, since those can point to a separate condition worth investigating.
The NHS can offer cognitive behavioural therapy for frequent nightmares, and for trauma-linked nightmares a GP can refer you for trauma-focused therapy. You don't need to have tried everything yourself first, and you definitely don't need to be embarrassed, this is one of the most common sleep complaints in the country.
Frequently Asked Questions
Are nightmares a sign of a mental health problem?
Not on their own, though the link deserves a look. Stress and anxiety are the most common triggers, and occasional nightmares are normal for everyone. But frequent nightmares are linked to anxiety, depression, and PTSD, so if they're happening most nights or affecting your daytime mood, it's worth mentioning to your GP.
Why do I keep having the same nightmare over and over?
Recurring nightmares usually replay an unresolved stressor or a memory your brain hasn't filed away yet. Imagery rehearsal therapy is designed for exactly this pattern: you rewrite the dream's ending while awake, then practise the new version daily for one to two weeks.
Can alcohol cause nightmares?
Yes, and it's one of the easier triggers to fix. Alcohol suppresses REM sleep in the first half of the night, and as it wears off your brain rebounds into more intense REM later on, which is when vivid dreams and nightmares surface. Cutting back, especially in the hours before bed, often reduces them.
Do nightmares happen during REM sleep?
Yes, almost always, which explains the timing. Nightmares happen mostly in REM sleep, which is why they're more common in the second half of the night when REM periods get longer. Night terrors are different: they happen in deep non-REM sleep early in the night, and the person usually doesn't remember them.
Is it normal for adults to have nightmares?
Occasional nightmares are normal at any age. Around 2% to 5% of adults have them at least once a week. When they happen often enough to disturb your sleep or your day, that's the point where treatment like imagery rehearsal therapy is worth trying.
What's the difference between a nightmare and a night terror?
A nightmare is a frightening dream in REM sleep that wakes you, and you remember it. A night terror happens in deep non-REM sleep early in the night: you might sit up, shout, or thrash while still asleep, and you won't remember it the next morning. Night terrors mostly affect children, though adults can have them too.
The Bottom Line
Nightmares in adults are common, they're not a sign you're broken, and there's a treatment with decades of evidence behind it. Start with the four free steps tonight: steady schedule, no evening alcohol, don't replay the dream when you wake, and write it down in the morning. Then add imagery rehearsal therapy for one to two weeks, and if that doesn't help, take it to your GP.
The one thing not to do is suffer in silence and assume it's just how you sleep. Nightmare disorder is diagnosable and treatable on the NHS, and the technique above is something you can start tonight with nothing but a notebook.
For more sleep guides, visit SleepReview
