When a Nightmare Is Worth Telling Someone About

01An ordinary bad dream and a pattern are different things

Almost everyone has nightmares now and then. You wake with your heart going, the room takes a second to come back, and for a while the dream feels closer than the bedroom. Sometimes it follows you into the morning and colours the first hour of the day. That is unpleasant, and it is also ordinary. A single frightening dream, however strange or upsetting its content, does not by itself point to a problem.

What sleep medicine looks at is not how scary a dream was or what happened in it. The American Academy of Sleep Medicine, in its 2018 position paper on treating nightmare disorder in adults, works from diagnostic criteria built around two things together: dreams that are repeated, frightening or distressing, and well remembered, plus real distress or impairment in the rest of your life. The second half matters as much as the first. Plenty of people have frequent bad dreams and shrug them off by lunchtime. Others have fewer but find each one leaves them shaken for days. The difference between those two people is not the dream. It is what the dream does afterwards.

That is a more useful way to think about your own situation than counting nights. A private bad night is one that ends when you wake up properly, have a coffee and get on with your day. A pattern is one that keeps reaching forward into the next day and the next night.

02The signs that it has moved past a bad night

There is no single sign that settles the question, and you do not need all of them. What follows are the observable changes that tend to mark the shift from "I had a horrible dream" to "this is affecting me." If one or more of them sounds familiar and has lasted a while, that is a reasonable point to mention it to someone.

The same dream, or the same kind of dream, keeps returning

Recurrence is often the first thing people notice, and why recurring dreams repeat covers the pattern itself. It might be the identical scene each time, the same house or the same pursuer, or it might be a family of dreams that share a feeling: being trapped, being late and unable to reach someone, losing a person you love. Recurrence on its own is not a diagnosis. It becomes more significant when each return brings the same dread with it, and when you start to recognise the dream coming before it has fully begun.

You are losing sleep because of it

Some nightmares wake you fully, and then you lie there unable to get back to sleep, either because your body is still keyed up or because you do not want to risk going back into the dream. One night of that is tiring. Several nights a week, over a few weeks, adds up to real sleep loss, and that is something a doctor will take seriously whatever caused it.

You have started to dread or avoid sleep

This one can creep up quietly. You stay up later than you mean to, scrolling or watching one more episode, because bed has started to feel like the place where the bad thing happens. You might leave a light on, sleep on the sofa, or have a drink to knock yourself out. Avoiding sleep is one of the clearest signs that a nightmare pattern has moved into your waking life, because the fear is now shaping what you do while you are awake.

The dream stays with you in the day

Daytime effects are a big part of what separates a pattern from a bad night. That can mean feeling exhausted, finding it hard to concentrate, being jumpy or irritable, or having images from the dream come back uninvited while you are doing something else. If you find yourself thinking about the dream on the train, at your desk or while cooking dinner, and it brings the feeling back with it, that is the dream reaching further than it should.

It is starting to touch work or relationships

The last marker is the knock-on effect. Tiredness shows up as mistakes at work. A partner is being woken by you, or you have started sleeping apart. You are shorter with the people around you, or you have stopped wanting to go to things because you are too tired. These are exactly the kinds of changes that the clinical criteria mean by impairment, and they are also the kinds of changes that tell you something is worth talking about, whether or not anyone ever puts a name to it.

03Why there is no magic number of nights

Many people want a number: three nightmares a week, or five nights in a row, or a month of them. It would make the decision easier. The trouble is that frequency on its own does not tell you how much a pattern is costing you.

Some sources do describe severity in terms of frequency. Cleveland Clinic, for example, describes mild as less than one episode a week, moderate as one or more a week but not every night, and severe as nightly. Those bands are a way of describing how often something happens. They are not a cut-off below which you should keep quiet. Someone who has one nightmare a week and spends the next two days unable to shake it may be affected more than someone who has three and forgets them by breakfast.

For a sense of how common frequent nightmares are, one large survey helps. Li and colleagues surveyed 8,558 adults in Hong Kong and found that 5.1 percent reported nightmares at least once a week. That tells you weekly nightmares are not rare, and also that most adults do not have them that often. It says nothing about any one person's experience, and it was one population at one point in time.

The more useful question is not "how many?" but "what is it doing to me?" If the answer is "not much, really," you can let it be and see whether it settles. If the answer is "quite a lot," the count does not have to reach any particular number before you are allowed to mention it.

04Nightmare disorder is a real condition, and it can be treated

It helps to know that what you are dealing with has a name and a place in medicine. Nightmare disorder appears in the main diagnostic systems used by sleep specialists and psychiatrists, including the American Psychiatric Association's DSM-5 and the International Classification of Sleep Disorders. The AASM paper by Morgenthaler and colleagues estimates that about 4 percent of adults have it. That is not a tiny number. In a busy office or a large family, the odds are that someone else is living with the same thing.

It is also treatable. The same 2018 paper recommends imagery rehearsal therapy for adults with nightmare disorder and for nightmares linked to post-traumatic stress. In imagery rehearsal, you work with a therapist to rewrite the nightmare while awake, changing the story in whatever way you choose, and then rehearse the new version in your mind during the day. An earlier AASM review by Aurora and colleagues had already recommended it at the highest level the academy used. That earlier guidance summarised a randomised trial of 168 women with moderate to severe post-traumatic stress symptoms in which imagery rehearsal improved disturbing dreams and sleep. Much of that research came from a limited number of sites, and the recommendation supports a treatment option rather than a promise that it works for everyone. It does mean there is something concrete to offer.

Very few people ask. A review by Gieselmann and colleagues notes that most people with nightmare problems do not seek help, and it cites studies in which fewer than a third of sufferers believed nightmares could be treated at all. So, if you have been assuming there is nothing anyone can do, you are in large company, and the assumption is not correct.

That is the heart of why mentioning it is low stakes. You are not asking someone to interpret a dream or to decide whether you are unwell. You are telling them that something has been disturbing your sleep and your days, and that is a normal thing to bring to a doctor.

05What the dream means and what it is doing are separate questions

Many people hold back from mentioning a nightmare because they think they would have to explain it. What if the content is embarrassing, violent or strange? What if the person thinks it says something about them?

It helps to split the question in two. One question is what the dream might mean to you. That is a personal, reflective question, and there are plenty of ways to think about it, from psychology to your own cultural or religious tradition. If you want to sit with that side of it, what nightmares can mean goes through some of the common readings. None of those readings can be tested, and no outsider can tell you with certainty what your dream was about.

The other question is what the dream is doing to your life. That is the one that matters for deciding whether to tell someone, and it does not need the content at all. You can say "I keep having the same bad dream and it is wrecking my sleep" without describing a single scene. A clinician is far more interested in how often, how long, how it affects you and what else changed around the time it started than in the plot.

The same goes for worries that a recurring dream is a warning. Across traditions, some people hold that dreams can carry messages or omens, and that is a belief with a long history. The research on nightmares, though, does not find that they predict events or reveal a single hidden truth. A recurring frightening image can be worth raising because it is distressing and disruptive, and that is where its importance lies.

06When it might not be a nightmare at all

Sometimes the thing that happens at night is not quite a nightmare, and the difference changes who you should tell and how soon. The NHS page on night terrors and nightmares draws some of these lines, and the AASM material does the same.

A nightmare is a frightening dream you remember. You usually wake from it quickly, know where you are within a moment or two, and can often describe what happened.

A night terror is different. People having one may scream, thrash or sit up looking terrified, but they are not properly awake, they are often confused, and they usually remember little or nothing the next morning. Night terrors are more common in children, and in adults a partner is often the one who notices them. If you are the one watching, what to do during a night terror covers the moment itself.

Sleep paralysis is the experience of being awake but unable to move for a short time as you fall asleep or wake up, sometimes with a strong sense that someone is in the room. It can be very frightening, and it overlaps with nightmares in feeling, but it is a separate event.

Acting out dreams is the one that deserves the most attention. If you shout, punch, kick, get out of bed or move in ways that could hurt you or a bed partner while you are dreaming, that is a safety issue and not the same thing as an ordinary remembered nightmare. It is worth raising with a doctor promptly, and in the meantime it makes sense to make the bedroom safer by moving anything sharp or breakable away from the bed.

If you are not sure which of these you are dealing with, a partner's description can help a great deal. You may remember one thing while they saw something else entirely.

07What can change the pattern

Nightmares rarely have one clean cause, and it is useful to know what can make them more frequent or more memorable before you decide what is going on. None of the following is a diagnosis. They are things worth noticing, because they often come up in a conversation with a doctor.

Stress, worry and low mood

Nightmares are well known to travel with stress, anxiety and low mood. A systematic review by Sheaves, Rek and Freeman brought together 24 longitudinal studies and 16 trials on nightmares and psychiatric symptoms. The link between nightmares and anxiety, depression and post-traumatic stress is well established, but the review also points out that many studies measured nightmares with a single question, and the direction of cause is not settled. Nightmares may feed worry, worry may feed nightmares, or both may come from something else.

One earlier study looked at the worry side more closely. Rek, Sheaves and Freeman surveyed 846 adults in the UK, about 90 percent of them women, at a single point in time. They found nightmares and worry went together, and in their discussion they suggested that the two might feed each other in a loop. That loop is the authors' suggestion rather than something the study measured, but it is a useful idea to have in mind if your nightmares and your daytime worries seem to rise and fall together.

Sleep loss and irregular sleep

This one surprises people. Nightmares are usually linked to REM sleep, the stage in which most vivid dreaming happens, and REM periods get longer towards the morning. When your sleep is broken up, you are more likely to wake during or just after a dream, which makes it more likely you will remember it. That means disturbed sleep can increase how many bad dreams you recall without necessarily changing how many you have.

After a stretch of short sleep, the body tends to catch up with more REM, sometimes called REM rebound, and dreams during that catch-up sleep can feel more intense. The sleep-stage part of that is well described. Whether it explains any one person's nightmares is a guess. If your nightmares started during a spell of shift work, a new baby or late nights, that timing is worth mentioning. For more on why dreams can seem so sharp after broken sleep, see why your dreams are so vivid.

Alcohol

Alcohol can make it easier to fall asleep and then break sleep up later in the night as it wears off, which can mean more awakenings and more remembered dreams. Stopping or cutting down after heavy drinking can also disturb sleep for a while. If you notice nightmares clustering after nights of drinking, or after you changed how much you drink, write that down.

Medicines and other substances

Some medicines list nightmares or abnormal dreams among their reported side effects, and labels differ from one product to another. As one example, the US DailyMed prescribing information for lemborexant (sold as DAYVIGO) lists "nightmare or abnormal dreams" in its trial side-effect table: 0.9 percent of people at 5 mg, 2.2 percent at 10 mg and 0.9 percent on placebo during the first 30 days. That figure belongs to that one medicine in those trials. It cannot be applied to other drugs, and it is not a prediction of what will happen to any one person.

If your nightmares began around the time you started, stopped or changed a medicine, that timing is worth raising with the person who prescribed it. A close link in time is worth mentioning, and it is not proof on its own, because the condition being treated, sleep changes, alcohol and other medicines can all overlap. Please do not stop, skip or change a prescribed medicine because of dreams; take the pattern to your prescriber or pharmacist and let them look at the full timeline.

08If something frightening happened to you

Nightmares after a frightening or painful event are common, and they deserve a gentle mention of their own. If the bad dreams began after an accident, an assault, a loss or another hard experience, that is worth saying when you talk to someone. It does not mean you have post-traumatic stress disorder, and it does not mean something is wrong with you. Nightmares can occur with or without a trauma-related condition, and a single recurring dream cannot establish either.

Mentioning it simply opens the door to support. Researchers have proposed that the body's alarm system, which stays switched on after a threat, may play a part in trauma-related nightmares. That idea is plausible and has shaped some treatments, but it cannot tell you why your particular dream is happening. What it does mean is that people who treat nightmares are used to hearing about them in this context, and imagery rehearsal therapy was specifically recommended for nightmares linked to post-traumatic stress.

You do not have to tell the whole story to get help. "I have been having nightmares since something happened a few months ago" is enough to start with.

09Who to tell

"Someone" can mean different people, and each one offers something different.

A partner, close friend or family member is often the easiest first step. Saying it out loud to someone you trust can take some of the weight off, and a bed partner may be able to tell you things you cannot know yourself: whether you talk, shout or move, and how often it happens. You do not need their advice. Sometimes just hearing "that sounds awful, no wonder you are tired" makes the next step easier.

A family doctor or GP is the right person when the pattern is affecting your sleep and your days. The NHS advises seeing a GP for regular nightmares that are affecting sleep and daily life. A doctor can look at medicines, alcohol, other health problems and other sleep disorders, and can refer you on if needed.

A therapist or counsellor is a good fit if the nightmares are tied up with stress, grief, anxiety or something that happened to you, or if you would like to try a talking treatment such as imagery rehearsal. Some therapists specialise in sleep or in trauma.

A sleep specialist or sleep clinic comes in when there is a question about what is happening at night, especially acting out dreams, or when other treatment has not helped. Usually a doctor makes that referral.

None of these conversations commits you to anything. You can mention it once, see what they say, and decide from there.

10What to notice before you say something

A little information makes any conversation easier and more useful. You do not need a detailed record. A week or two of short notes on your phone is plenty, and it turns "I keep having bad dreams" into something a doctor can work with. The NHS suggests keeping a sleep diary to help work out what might be behind sleep problems.

Things worth noting:

• The date and roughly what time you went to bed and got up.
• Whether you had a nightmare you remember, and how upsetting it was, perhaps on a scale of 0 to 10.
• How many times you woke, and whether you could get back to sleep.
• How you felt the next day: tired, jumpy, low, or fine.
• Whether you put off going to bed or avoided sleep.
• Any alcohol, medicines, changes in dose or timing, or other substances.
• Anything stressful going on.
• Whether you or anyone else noticed you moving, shouting or getting out of bed.
• When the pattern first started, and what else changed around then.

Notice that none of this asks what the dream was about. You can add that if you want, but the pattern is the part that answers the question of whether it is worth raising. If you want steadier steps for the night itself and the following morning, what to do after a bad dream covers that side.

11How to bring it up

Often the hardest part is the first sentence. It can help to have one ready so you do not have to find the words in the moment.

With a doctor, something like: "I have been having bad dreams most weeks for about two months. They are waking me up and I am tired and on edge during the day. I wanted to mention it." That is clear, it gives the time frame and the effect, and it does not need any explanation of the dream.

With a therapist: "Since the spring I have been having a recurring nightmare and it is starting to affect my sleep and my mood. I would like to talk about it." If there is an event behind it, you can add it or leave it for later.

With a partner or friend: "I know it sounds small, but I have been having the same bad dream and it is getting to me." You may be surprised how often the answer is "me too" or "I wondered why you were so tired."

If the doctor asks questions you cannot answer, that is fine. Your notes will cover most of it, and the rest can wait.

12When it needs attention sooner

Most nightmare patterns can be raised at an ordinary appointment. A few situations call for a quicker conversation.

If you move, shout, hit out or get out of bed while dreaming, especially if you or a bed partner could be hurt, mention it to a doctor soon and make the bedroom safer in the meantime.

If you are hardly sleeping at all because of nightmares, or you feel you cannot cope with the days, do not wait for the pattern to settle before you speak to someone.

If the distress includes thoughts of harming yourself, or you feel unable to stay safe, please contact your local emergency number or a crisis line straight away. That is what they are there for, and reaching out is the right thing to do.

13Common questions about when to worry about nightmares

How often is too often for nightmares?

There is no single number that marks a problem. Repeated nightmares matter when they cause distress or disrupt your sleep or your days, whether that is once a week or every night. If they are costing you sleep, mood or concentration, that is a reasonable time to mention them.

Do recurring nightmares mean I have been through trauma?

Not necessarily. Nightmares can happen with stress, grief or trauma, but they also happen without any of these, and one dream or recurring theme cannot prove either. If the nightmares began after a frightening event, saying so helps whoever you talk to offer the right support.

Can a medicine or alcohol cause nightmares?

Some medicines, alcohol use and stopping alcohol can all be involved, along with sleep loss. The best step is to note when the nightmares started and what changed around that time, then take it to your doctor or pharmacist. Do not change a prescribed medicine on your own because of dreams.

Is acting out a dream the same as having a nightmare?

No. Shouting, punching or leaving the bed while dreaming is a separate issue from a remembered nightmare and is a safety concern. It is worth raising with a doctor promptly.

Will recurring nightmares go away on their own?

Some do, particularly when a stressful period ends or sleep settles. There is no set timeline, though, and patterns that keep affecting your life have tested treatment options, so there is no need to wait them out.

Are nightmares warning signs?

Some traditions hold that dreams can carry messages or omens, and that belief has a long history. The research on nightmares does not find that they predict events. A recurring frightening dream is worth raising because it is distressing and disruptive, and that is reason enough.

14A last word

A bad dream you can shake off by lunch is part of being a person who sleeps. A dream that keeps returning, keeps you from sleep and follows you through the day is something else, and it is worth a few sentences to someone who can help. Saying it costs you very little. It might be the first step towards sleeping properly again. This page cannot tell you what is going on in your own case; a doctor or therapist who hears the details can.

DreamTold is here for the reflecting side too. If an image from the dream keeps coming back and you want to think about what it might mean to you, look it up in the dream dictionary when you are rested, and take the pattern itself to someone who can help with your sleep.

15Sources

Every claim on this page that comes from somewhere else, with the somewhere else.

• PubMed: 2018 position paper on treating nightmare disorder in adults
• PubMed: Aurora and colleagues
• PubMed: Gieselmann and colleagues
• PubMed: Li and colleagues surveyed 8,558 adults in Hong Kong
• PubMed: Rek, Sheaves and Freeman surveyed 846 adults in the UK
• PubMed: Sheaves, Rek and Freeman