Last updated: October 2026
Sleep talking (somniloquy) is talking, mumbling, laughing or shouting in your sleep without knowing it. It’s very common and usually harmless: two in three adults in one large survey said they had done it. Stress, too little sleep, alcohol and fever can trigger it. See a GP if you act out your dreams.
What is sleep talking?
Sleep talking is a parasomnia, the medical name for unusual things people do while asleep, like sleepwalking or teeth grinding. It can be a few mumbled sounds or whole sentences, and it can happen in dreaming (REM) sleep or in deeper non-REM sleep. Most sleep talkers have no memory of it in the morning, which is why it’s usually a partner or housemate who notices.
Much of what comes out isn’t words at all: in a French study that recorded 883 episodes of sleep speech in a sleep lab, 59% were mumbles, whispers, shouts or laughs rather than understandable words.
Is sleep talking normal?
Yes. It’s one of the most common things people do in their sleep. In a Norwegian telephone survey of 1,000 adults, 66.8% said they had talked in their sleep at some point, and 17.7% had done so in the previous three months. In the same survey, about 12% reported five or more different parasomnias, so sleep talking often comes alongside other night-time habits.
Children do it too. A large Finnish twin study found childhood sleep talking often went hand in hand with sleepwalking, nightmares and teeth grinding, and the same links held in adults.
Why do I talk in my sleep?
Nobody knows exactly why some people talk in their sleep, and for most it happens now and then for no obvious reason. The triggers usually mentioned are the same ones the NHS lists for sleepwalking, a closely related habit:
- Not getting enough sleep. Being short of sleep is one of the most common triggers. See sleep deprivation.
- Stress. Busy, worried minds tend to sleep more lightly. See stress symptoms and anxiety at night.
- Alcohol, especially in the evening. See CBD and alcohol.
- Being unwell with a high temperature. Fever can bring on night-time episodes. See how to sleep with a cold.
- Some medicines, such as sleeping pills. Don’t stop a prescribed medicine without speaking to your GP or pharmacist first.
- Family history. In the Finnish twin study, about half of the genetic influence on sleep talking was shared with sleepwalking.
Other sleep problems that break up the night, such as sleep apnoea, can also play a part.
Is sleep talking a sign of something?
On its own, usually not. Occasional sleep talking in an otherwise healthy person isn’t a sign of illness. It’s worth knowing how it differs from other night-time events, though:
| What happens | Typical signs | Worth a GP visit? |
|---|---|---|
| Sleep talking | Mumbling, words or laughing, no memory of it | Rarely, unless it’s new, frequent or comes with other signs below |
| Sleepwalking | Getting up and moving around while asleep | If it disrupts sleep or risks injury |
| Night terrors | Screaming, thrashing, eyes open but not awake, early in the night; most common in children aged 3 to 8 | If a child starts after 5 or still has them after 12 |
| Nightmares | Waking from a bad dream you remember, later in the night | If regular and affecting daily life |
| REM sleep behaviour disorder | Shouting, punching or kicking while acting out vivid dreams | Yes, always |
REM sleep behaviour disorder (RBD) is the one to take seriously. Normally your muscles are switched off while you dream; in RBD they aren’t, so people act out their dreams and can hurt themselves or a partner. It can be linked to some antidepressants, and research reviews link it with conditions such as Parkinson’s disease and dementia with Lewy bodies, sometimes years before other symptoms. If you, or a partner, notice this kind of dream enactment, especially if it starts in middle or later life, see a GP.
Related: sleep paralysis and hypnic jerks, two other common and usually harmless sleep quirks.
Do people tell the truth or reveal secrets when they sleep talk?
This is mostly myth. Sleep talkers aren’t aware of what they say, can’t be questioned reliably and won’t remember it. What comes out is often fragments of a dream, not a confession.
The French sleep-lab study of 232 adults (most of them people with sleep disorders) gives a flavour: the most common word was “no”, about a fifth of clauses were negatives, and nearly one in ten contained swearing. The researchers described sleep speech as mostly a tense conversation with people who aren’t there. So if your partner says something odd at 2am, it’s far more likely to be dream chatter than a secret.
How to stop sleep talking
There’s no switch to turn sleep talking off, and for most people it doesn’t need treatment. The aim is steadier, deeper sleep, which tends to mean fewer episodes:
- Keep regular sleep times, including at weekends, and give yourself enough hours. Our sleep hygiene guide covers the basics.
- Cut back on evening alcohol and caffeine. If you’d like a nightcap swap, see our alcohol-free nightcaps.
- Lower stress before bed with a wind-down routine: dim lights, no work emails, a few minutes of slow breathing. See how to relieve stress.
- Keep a two-week diary (or ask a partner to note episodes) to spot triggers like late drinks or short nights.
- Review medicines with your GP or pharmacist if sleep talking started after a new one.
A warm, caffeine-free drink can be a pleasant part of winding down. Our Magnesium Glycinate Sleep Complex is a bedtime drink with magnesium, glycine and L-theanine; magnesium contributes to normal psychological function. It isn’t a treatment for sleep talking. Read more in magnesium for sleep.
If your partner talks in their sleep
Sleep talking is often harder on the person lying next to the talker. A few things help:
- Earplugs (foam or soft silicone) take the edge off mumbling.
- White noise or a fan can mask sudden words.
- There’s no need to wake them or reply; it won’t tell you anything useful.
- Separate beds or rooms on bad nights are fine. Lots of couples do it, as our guide to sleep divorce explains.
If they also snore loudly or seem to stop breathing, read how to stop snoring and mention it to a GP.
When to see a GP
See a GP if:
- you shout, punch, kick or act out dreams in your sleep, or have hurt yourself or someone else
- sleep talking is new in adulthood, frequent, or getting worse
- it comes with sleepwalking that puts you at risk of injury
- you feel very tired during the day, or your breathing stops and starts while you sleep
- it’s disrupting your sleep, or your partner’s, night after night
Your GP may refer you to a sleep clinic, where a sleep study can show what’s happening during the night.
FAQs
Is sleep talking normal?
Yes. It’s very common and usually harmless. In a Norwegian survey of 1,000 adults, two in three said they had talked in their sleep at some point.
Why do I talk in my sleep?
Common triggers are too little sleep, stress, alcohol, fever and some medicines. It also runs in families and often comes with sleepwalking or nightmares.
What does it mean when you talk in your sleep?
Usually nothing more than a brain that is partly stirring during sleep. What people say is often dream fragments, not hidden thoughts.
Do people tell the truth when they sleep talk?
There’s no good evidence they do. Sleep talkers aren’t aware of what they say, much of it is mumbling, and recordings suggest it’s mostly dream chatter.
Is talking in your sleep a sign of dementia?
Ordinary sleep talking isn’t. But acting out dreams, such as shouting, punching or kicking in your sleep, can be linked to Parkinson’s and some types of dementia, so see a GP if you notice it.
How can I stop talking in my sleep?
Keep regular sleep times, get enough sleep, cut back on evening alcohol and manage stress. See a GP if it’s frequent, new or comes with acting out dreams.
Sources
- NHS. Sleepwalking.
- NHS. Night terrors and nightmares.
- Bjorvatn B, et al. Prevalence of different parasomnias in the general population. Sleep Med. 2010.
- Arnulf I, et al. What does the sleeping brain say? Syntax and semantics of sleep talking in healthy subjects and in parasomnia patients. Sleep. 2017.
- Hublin C, et al. Parasomnias: co-occurrence and genetics. Psychiatr Genet. 2001.
- Dauvilliers Y, et al. REM sleep behaviour disorder. Nat Rev Dis Primers. 2018.
This guide is general information, not medical advice. Evopure makes the Magnesium Glycinate Sleep Complex and Reishi Mushroom Adaptogenic Complex.
