Nightmare Disorder in Adults: How Imagery Rehearsal Therapy Rewrites Bad Dreams

Last reviewed: 06/23/2026

Reviewed by: Dr. Kiesa Kelly

If the same bad dream keeps jolting you awake at 3 or 4 in the morning — heart pounding, fully alert, dreading the next night — you are not simply a "bad sleeper," and you are not stuck with it. Recurring nightmares in adults can rise to the level of a recognized clinical condition called nightmare disorder, and there is a well-studied behavioral treatment that directly targets the dreams themselves. It is called imagery rehearsal therapy, and the core idea is surprisingly hopeful: you can rewrite the script.

This article is for adults who are tired of bracing for sleep. We will explain what nightmare disorder actually is, how imagery rehearsal therapy works in plain language, what a course of treatment looks like, and how to tell whether it is the right fit for you. The decision underneath all of this is a practical one — do you keep waiting for the nightmares to fade on their own, or do you treat them directly?

In this article, you'll learn:

• What separates ordinary bad dreams from nightmare disorder

• How imagery rehearsal therapy (IRT) changes recurring nightmares

• What a typical course of treatment involves and how progress shows up

• When IRT is a strong fit and when something else may come first

• Why nightmares often travel with mood, trauma, medications, or sleep problems

The short answer: what imagery rehearsal therapy is

Imagery rehearsal therapy is a structured, evidence-based talk treatment for chronic nightmares. You work with a clinician to take a recurring nightmare, deliberately rewrite it into a new and less threatening story while you are awake, and then practice that new version through short, daily mental imagery. The American Academy of Sleep Medicine (AASM) names IRT the recommended first-line behavioral treatment for nightmare disorder in adults [1].

What makes IRT distinctive is that it goes after the nightmares directly rather than only treating sleep in general. Chronic nightmares are not just a symptom riding on top of poor sleep — they can become a learned pattern that repeats. If you have already explored sleep hygiene or general insomnia support without the dreams letting up, that is a sign the dreams themselves may need their own targeted approach. IRT is also fully deliverable over secure video, which matters when nightmares have already worn down your energy and motivation.

Before we get to the technique, it helps to be clear about what we are treating. Not every bad dream needs treatment, and naming the actual disorder prevents both over-worry and under-treatment.

Three things people get wrong about nightmares

"Nightmares are just stress — they'll pass." Sometimes they do. But when nightmares recur, wake you fully, and start shaping how you feel about going to bed, they can settle into a self-sustaining pattern. Roughly 2 to 6 percent of adults experience frequent nightmares, and for many that frequency is stable, not fleeting [2]. Persistent nightmares are treatable, not something to simply outlast.

"If I have nightmares, something must be deeply wrong with me." Nightmares are common and very human. They occur more often alongside conditions like post-traumatic stress and depression, but they also occur on their own [2]. Having recurring nightmares does not define you or your prognosis — it points to a specific, workable target.

"There's no real treatment for nightmares — you just manage them." This is the costliest misconception. There is a treatment with a clear evidence base and a formal first-line recommendation behind it [1]. Managing around nightmares is not the only option; reducing them is a realistic goal.

How it works

The mechanism in plain language

A recurring nightmare behaves a little like a worn groove — the same frightening sequence plays out, night after night, along a familiar track. Imagery rehearsal therapy works by laying down a new track. While you are awake and calm, you and your clinician take the nightmare and change it: not by forcing a happy ending, but by reshaping the story into a version that is less threatening and more tolerable. You might shift the ending, change what you are able to do in the dream, or alter the meaning of the threatening element entirely.

Then you rehearse. Each day, for just a few minutes, you mentally run through the rewritten version, holding it in vivid imagery. The aim is for the new, practiced script to gradually compete with the old one, so the nightmare loses its grip. You are essentially training your imagination during the day to change what your mind reaches for at night.

This is a learning-based treatment, not a relaxation exercise. The rewriting is deliberate and the rehearsal is consistent, which is why working with a trained clinician — rather than improvising alone — tends to produce better results. If trauma is part of your history, a clinician can also help you do this work at a pace that feels safe, and our specialized therapy team is set up for exactly that kind of careful, individualized care.

What it targets

IRT targets the nightmares as a problem in their own right — their frequency, their intensity, and the dread that builds around bedtime. Consider a common pattern: you fall asleep fine, but in the small hours the same chase dream wakes you fully alert, and you lie there too keyed up to drift back off. That stuck-awake stretch is its own problem, and a behavioral tactic like the CBT-I 20-minute rule of getting out of bed can keep the bed from becoming a place your body associates with frustration. Over weeks, you start going to bed later to avoid the dream, your sleep window shrinks, and you wake exhausted. IRT steps directly into that loop by changing the dream you are bracing against.

Here is another recognizable scenario. After a frightening event months ago, a version of it keeps replaying in your dreams, always ending the same way, always leaving you shaken. You have tried to think about it less during the day, but the nights keep returning to it. IRT does not ask you to relive the event; it asks you to rehearse a different, less distressing version while awake, so the dream that visits you at night has somewhere else to go. Because nightmares so often travel with mood and trauma, treating them can ripple outward — research indicates IRT can also reduce depressive, anxiety, and even suicidal symptoms for some people [3].

Key takeaway: 🎬 IRT does not erase the memory of a bad dream — it gives your sleeping mind a rehearsed alternative to reach for, which is why it can lower both how often nightmares come and how much they cost you.

What to expect from treatment

A typical course

IRT is typically a short, focused course rather than open-ended therapy. Early sessions establish what is happening with your sleep and screen for the things that commonly accompany nightmares — trauma history, mood, and any medications or substances that could be feeding the dreams. From there, you learn the imagery technique, choose a nightmare to work with, and build the rewritten version together. Much of the change comes from the daily home practice between sessions, where you rehearse the new script for a few minutes at a time.

Because the active ingredients are conversation and mental imagery, there is no equipment and nothing physical to set up — which is precisely why IRT works well over telehealth. You and your clinician can build and rehearse the new dream on screen just as effectively as in a room, and you carry the practice home with you either way.

What progress looks like

Progress usually shows up as a quiet loosening rather than a single dramatic night. The targeted nightmare tends to come less often, or arrives in a milder form, or stops waking you so completely. Many people notice the anticipatory dread easing first — the dial-down of bedtime apprehension — before the dreams themselves fully settle. As nights stabilize, daytime energy, mood, and concentration often follow, because the underlying sleep is finally being protected.

It is worth being honest about the evidence here: IRT is well-supported as the first-line behavioral approach [1], and results are encouraging, but no treatment works identically for everyone. If progress stalls, that is useful information — it may mean another contributor, like an untreated mood condition or a medication effect, needs attention alongside the imagery work. A depression screener like the PHQ-9 can be one early signal of whether mood is part of the picture and worth addressing in parallel.

Key takeaway: 📉 Improvement in IRT is usually gradual and layered — less dread first, then fewer or milder nightmares, then better days — not an overnight switch.

Who it is right for

When it is a strong fit

IRT is a strong fit when recurring nightmares are a clear and central problem — when you can identify a dream or a small set of dreams that keep returning, wake you to full alertness, and leave a daytime toll. It fits whether the nightmares are tied to a past trauma or seem to arise on their own, and it pairs well with broader trauma-focused care when that is also needed. If you have already tried general sleep strategies and the dreams persist, the dreams likely need their own targeted treatment, and IRT is built for exactly that.

It is also a good fit for adults who want a focused, skills-based approach with clear home practice and a defined arc. Many people appreciate that it gives them something active to do rather than waiting and hoping. Because nightmares cluster with conditions like PTSD, depression, and some personality disorders, a thorough mental health screening at the start helps make sure the treatment plan addresses the whole picture, not just the dreams in isolation. Recent research even suggests IRT can ease nightmares and related anxiety in populations where they are especially common, such as adults with borderline personality disorder [11].

When something else may fit better

Sometimes another step comes first. If your nightmares began or worsened soon after a medication change, the medication itself may be the driver — drugs that act on norepinephrine, serotonin, or GABA systems are recognized contributors, and nightmares can also spike during alcohol or sedative withdrawal [2][4]. In those cases, the most important first move is a conversation with your prescriber; never stop a prescribed medication on your own. IRT can still help, but reviewing contributors comes first.

There are also moments when nightmares are one piece of a larger, more acute problem — significant untreated depression, active substance withdrawal, or a safety concern — that needs direct attention before or alongside the imagery work. And occasionally, what looks like a nightmare is better explained by a different sleep phenomenon entirely, which is why a structured behavioral sleep assessment matters before settling on a treatment. The goal is not to push everyone toward one technique, but to match the treatment to what is actually driving the nights.

Before you start, it helps to come prepared. A few questions worth asking any provider:

• Scope: Will the evaluation screen for trauma, mood, and medication effects, not just the nightmares themselves?

• Methodology: How will you decide whether imagery rehearsal therapy is the right first step for me?

• History: What sleep and mental health history will you gather, and how do you account for things I may not remember about when this started?

• Output: What will I actually leave with — a rewritten dream and a practice plan, a referral, or both?

• Coordination: If a medication or another condition seems to be contributing, how will you coordinate with my prescriber or other providers?

A clear next step

If recurring nightmares are stealing your sleep and shadowing your days, the most useful thing to know is that the dreams themselves are treatable — and that you do not have to keep bracing for bedtime. Imagery rehearsal therapy gives your mind a rehearsed alternative to the nightmare it keeps returning to, and it can be done entirely over telehealth at a pace that feels safe.

The decision you came in with — wait it out, or treat it directly — has a clear, evidence-based answer when nightmares are persistent and costly: treating them directly is a realistic, well-supported path. A careful evaluation is the place to start, both to confirm that nightmare disorder is what is going on and to catch anything traveling alongside it.

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Frequently Asked Questions

When do nightmares become a disorder?

Occasional nightmares are common and not a disorder. Nightmare disorder, as defined in the DSM-5, involves repeated, well-remembered, dysphoric dreams that wake you to full alertness — usually in the second half of the night — and cause clinically significant distress or daytime impairment. The line is not how scary a dream feels; it is the pattern, the recall, and the toll on your sleep, mood, or functioning.

How does imagery rehearsal therapy actually work?

Imagery rehearsal therapy (IRT) asks you to choose a recurring nightmare, rewrite it into a new, less distressing version while awake, then rehearse that new version through brief daily mental imagery. Over weeks, the rehearsed script tends to compete with the old one, and nightmares often become less frequent and less intense. IRT is the behavioral treatment the American Academy of Sleep Medicine recommends first for nightmare disorder.

Can imagery rehearsal therapy be done over telehealth?

Yes. IRT is a talking-and-imagery treatment with no equipment, so it translates well to secure video sessions. You and your clinician build the rewritten dream and practice the imagery technique together on screen, and you rehearse between sessions at home. Many adults find telehealth removes a barrier to starting, especially when nightmares have already disrupted sleep and daily energy.

Can medications cause nightmares?

They can. Medications that act on norepinephrine, serotonin, or GABA systems are recognized triggers for vivid or distressing dreams, and nightmares can also surge during alcohol or sedative withdrawal. If your nightmares started or worsened after a medication change, tell your prescriber — never stop a prescribed medication on your own. Reviewing contributors is part of a careful evaluation before or alongside IRT.

Are nightmares connected to depression or PTSD?

Often, yes. Nightmares occur more frequently alongside PTSD, depression, and some personality disorders, and they are notably more common during major depressive episodes. Encouragingly, research suggests that treating nightmares with IRT can also reduce depressive, anxiety, and suicidal symptoms for some people. Because of this overlap, a good evaluation screens for mood and trauma rather than treating the nightmares in isolation.

About the Author

Dr. Kiesa Kelly is a licensed clinical psychologist and the founder of ScienceWorks Behavioral Healthcare, with more than 20 years of experience in psychological assessment and evidence-based treatment. Her clinical training spans work with adults across mood, anxiety, trauma, and sleep-related concerns, with a focus on translating the research base into care people can actually use.

Dr. Kelly leads a telehealth-forward practice serving Tennessee, where adults can access evaluation and behavioral treatment — including approaches for nightmares, insomnia, and trauma — without the barrier of an in-person visit. She reviews ScienceWorks clinical content for accuracy before publication.

References

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Disclaimer

This article is for informational and educational purposes only and is not a substitute for professional medical or mental health advice, diagnosis, or treatment. Reading it does not create a clinician–patient relationship. If you are struggling with nightmares, sleep, mood, or trauma, please consult a qualified clinician about your specific situation. Do not start, stop, or change any prescribed medication without consulting your prescribing provider. If you are in crisis or thinking about harming yourself, call or text 988 (the Suicide and Crisis Lifeline) in the United States, or contact your local emergency services.