How to Stop Bad Dreams: Calmer Nights After a Run of Nightmares

You can rarely switch bad dreams off in one night, but you can usually make them less frequent. Steady sleep times, a quieter last hour before bed, less alcohol in the evening and a short exercise for rewriting the dream that keeps coming back are the changes that most often help. If nightmares follow a frightening event or leave you dreading sleep, that is a reason to talk to a doctor rather than push on alone.

What follows is general information about ordinary sleep. It cannot explain your particular dreams, and it does not replace advice from someone who knows your health.

Bad dreams and nightmares: is there a difference?

People use the words loosely, but there is a useful distinction. A bad dream is unpleasant while it lasts and fades once you are awake. A nightmare is vivid and disturbing enough to wake you, and you can often recall it in detail, sometimes with a racing heart or a sweaty neck. Both tend to happen during dreaming sleep, which takes up more of the second half of the night. That is why a frightening scene so often arrives in the early hours, a pattern described in our article on waking at 3am.

Why bad dreams come in clusters

Dreams seem to borrow from whatever is weighing on you, so a run of them often lines up with a busy or unsettled spell. Common triggers include:

• Stress and worry. Exams, money trouble, a new job or a strained relationship can all show up at night in disguised form.
• Short or irregular sleep. After a few short nights, the body may catch up on dreaming sleep, and dreams can feel more intense.
• Alcohol. It can make you drowsy at first, but sleep later in the night tends to become lighter and more broken, which leaves more room for vivid dreams.
• Medicines. Some prescription medicines list vivid dreams or nightmares as a possible side effect, and so can stopping certain ones. Never stop a medicine on your own; ask the pharmacist or prescriber.
• Illness and fever. A high temperature is well known for producing strange, jumbled dreams.
• Grief. Grief dreams, in which someone who has died appears, are very common after a loss. Some feel comforting and some feel painful.
• What you watch late at night. A tense series right before bed hands the sleeping mind fresh material.

Evening habits that tend to quieten the night

1. Keep a regular wake-up time. Getting up at roughly the same hour every day, weekends included, gives sleep a predictable shape.
2. Build a buffer hour. Use the last hour before bed for low-effort things: a shower, a printed book, folding laundry, gentle stretching.
3. Put the day's worries on paper. A short list of what is unfinished, with one next step beside each item, gives the mind permission to set it aside. Our guide to stepping out of an overthinking loop has more ideas along these lines.
4. Treat alcohol as occasional. Notice whether your dreams change on nights without it.
5. Make the room easy to sleep in. Dark, quiet and on the cool side. Our guide to the best temperature for sleeping covers the room itself, and a fan or other steady background sound can soften sudden noises that jolt you out of light sleep.
6. Choose lighter evening viewing. Save the thriller for a weekend afternoon if you notice a link.

Rewriting a recurring dream

When the same dream keeps returning, many people find it helps to give it a new ending while awake. This idea is used in some talking therapies for nightmares, and a simple home version looks like this:

1. During the day, write the dream down in a few plain sentences.
2. Change the story at any point you like. The chase stops, a door opens, the water turns shallow. The new version does not need to be realistic, only less frightening.
3. Spend a few minutes each day picturing the new version in as much detail as you can.

Keep it gentle. If writing about the dream brings up distressing memories, stop and consider getting support from a professional instead.

What to do when a nightmare wakes you

• Remind yourself where you are. Name a few objects in the room or use the 5-4-3-2-1 grounding technique to bring your attention back to your senses.
• Switch on a low light and sit up for a moment if the room feels too close.
• Breathe out slowly, letting each out-breath last a little longer than the in-breath.
• Avoid scrolling your phone. The bright screen and new information make it harder to drift back off.
• If sleep will not return, move to another dim room and do something dull until you feel drowsy.

Questions people often ask

Why am I having vivid dreams all of a sudden?

A sudden change often has a plain explanation: a stressful week, broken sleep, a new medicine, cutting down on something you used to take, illness, or pregnancy. If the change is marked and you cannot link it to anything, mention it at your next appointment.

Do grief dreams mean something is wrong?

No. Dreaming about someone who has died is a common part of grieving. If the dreams are so distressing that you avoid sleep, talking to a GP, a counsellor or a bereavement service can help.

Can food cause bad dreams?

There is no reliable list of foods that cause nightmares. A heavy meal late at night can make sleep less comfortable, though, and discomfort may make you wake during a dream and remember it.

When to speak to a doctor

Book an appointment if nightmares happen most weeks and leave you tired or anxious during the day, if they started after a traumatic event, if you are afraid to go to sleep, or if a bed partner says you shout, kick or move about as though acting out your dreams. Loud snoring with pauses in breathing is also worth raising. These can point to conditions that are worth checking, and help is available.