Sleep paralysis is the feeling of being awake but unable to move or speak, usually as you drift off or wake up. It is frightening, but the NHS Borders guidance describes it as “generally short-lived and not dangerous,” and it says most people will experience it on occasions. If episodes keep coming back, or come with distress or daytime sleepiness, that is the point to bring them to a clinician.
What happens in the body during sleep paralysis?
During dreaming sleep (REM), your muscles are switched off so you do not act out your dreams. The NHS Borders guidance says it is normal for the body to be paralysed during sleep, because this “prevents people acting out their dreams and putting themselves in danger.” Sleep paralysis happens when that switch-off lingers after you wake. A 2025 review indexed by PubMed puts it plainly: “Sleep paralysis results from the inability to immediately restore muscle tone during the transition from sleep to wakefulness.”
What causes sleep paralysis?
The exact cause is still open. A 2018 systematic review of 42 studies calls sleep paralysis “a relatively common but under-researched phenomenon” and notes that while the causes are unknown, many factors have been associated with it. Those include substance use, stress and trauma, genetic influences, sleep problems, anxiety symptoms and psychiatric disorders. The review found it is “particularly prevalent in post-traumatic stress disorder, and to a less degree, panic disorder.”
A 2021 review in Neurotherapeutics lists predisposing factors as sleep deprivation, irregular sleep-wake schedules and jetlag. It also says “variations in circadian rhythm genes might be involved in their pathogenesis.”
What are the symptoms of sleep paralysis?
The core experience is being conscious but unable to move your body or speak. The 2025 review describes people as having “full consciousness and awareness of their surroundings” while temporarily unable to talk or move. A 2024 Cureus review adds that the state often comes with “vivid hallucinations.” The NHS Borders guidance says the sensation is “often accompanied by sensory hallucinations or vivid dreams.”
- Being awake and aware, but unable to move or speak
- Vivid hallucinations or dreams, often at the moment of falling asleep or waking
- A strong sense of fear while the body stays still
What is anxiety paralysis, and how does it show up?
Anxiety paralysis is not a term used in the research reviewed here. The 2018 review lists anxiety symptoms among the variables associated with sleep paralysis, and says it is particularly prevalent in PTSD and, to a lesser degree, panic disorder. If you freeze when awake and anxious, ask a clinician. The 2021 review notes that in nightmare disorder, dread of nightmares can itself cause insomnia, so fear can become part of the cycle.
Is sleep paralysis dangerous, and can it kill you?
The NHS Borders guidance calls sleep paralysis “alarming, but generally short-lived and not dangerous.” It does not describe it as a risk to life. A 2024 review says that “while isolated episodes of SP are generally benign, recurrent episodes may warrant clinical attention, particularly when accompanied by distressing symptoms.” Being scared of it is real, but the episode itself is usually brief.
Is sleep paralysis scary, normal, or a warning sign?
It can be very scary. The NHS Borders guidance calls it a “frightening sensation.” It is also common. The guidance says it “is a normal phenomenon and most people will experience it on occasions,” and that it “usually begins in adolescence.” The 2021 review gives a different range: isolated sleep paralysis is “experienced at least once by up to 40% of the general population, whereas recurrence is less frequent.” Estimates vary, but a single episode is common.
As a warning sign, a one-off episode is usually not the concern. As of October 2026, the NHS Borders guidance (last reviewed 25 March 2025) says that if someone has daytime sleepiness or loss of muscle strength (cataplexy), they should be referred to neurology, and that no tests are needed if it is an isolated problem.
How do you stop sleep paralysis in the moment?
As of October 2026, the NHS Borders guidance suggests relaxing and attempting to move small muscles first. It also suggests asking a partner to wake you if they notice you trying to move or speak. It notes that “patients who experience this regularly may benefit from having strategies to wake up.”
Does wiggling your toes help?
Trying to move small muscles first is the guidance’s own suggestion, so wiggling a toe or finger is a reasonable thing to try. It is a suggested approach rather than a guaranteed way to end an episode.
How do you combat sleep paralysis over time?
The most consistent advice in the research is about routine. The 2021 review says “the most effective therapy consists of avoiding those factors”: sleep deprivation, irregular sleep-wake schedules and jetlag. The NHS Borders guidance adds that episodes “appear to happen more frequently in the supine (face up) position, so this could be avoided.” The NHS Every Mind Matters sleep guide says small changes to habits and routines can help you sleep, and that worry and stress can make it harder to sleep. The guidance also says there is usually no treatment necessary.
Here are the options side by side, so you can decide with a clinician what fits you.
| Option | What the research or guidance says | Cost | Who it suits | Limits |
|---|---|---|---|---|
| Steady sleep routine, enough sleep | The 2021 review calls avoiding sleep deprivation, irregular schedules and jetlag the most effective therapy. | No cost | Anyone whose episodes follow poor or irregular sleep | May not prevent every episode. |
| Sleeping on your side | The NHS Borders guidance says episodes appear to happen more often face up. | No cost | People who notice episodes when lying on their back | A pattern the guidance describes, not a rule. |
| Relaxation and wake-up strategies | The NHS Borders guidance suggests moving small muscles first, or a partner alerting you. | No cost | People who have episodes regularly | A suggested approach, not a guaranteed stop. |
| Cognitive behavioral therapy (CBT) | The 2024 Cureus review discusses CBT as a treatment option. The Cleveland Clinic calls CBT for insomnia “a first-line treatment.” The Cleveland Clinic statement is about insomnia, not sleep paralysis. The PubMed abstract of the 2024 Cureus review does not show how well CBT works for sleep paralysis. | Varies by provider; ask | People with ongoing sleep trouble or distress | For insomnia, the Cleveland Clinic says providers might follow someone for four to six sessions before they see progress. |
| Imagery rehearsal therapy | The 2021 review says nonmedication treatment, in particular imagery rehearsal therapy, is especially effective for nightmare disorder. | Varies; ask | People with nightmare disorder, to discuss with a clinician | The finding is for nightmare disorder, a related condition. |
| Medicines | The 2024 Cureus review mentions pharmacological interventions, but its abstract does not name a specific medicine. | Ask your clinician | Decided with a clinician | Only a clinician can weigh the risks for you. |
| Magnesium (sold for sleep generally) | As of October 2026, the Cleveland Clinic magnesium article says “Most of the studies on sleep and magnesium are small, and the overall evidence is lacking.” | Check today’s price directly with the company | Readers who want a sleep product | The article covers sleep in general, not sleep paralysis. It says magnesium “shouldn’t be your first step for managing ongoing sleep problems.” |
Are supplements or crystals a fix for sleep paralysis?
This page does not recommend a product for sleep paralysis, and it does not link to any for purchase. Prices and packs change, so check today’s price directly with the company. If a product page says it is intended for treating, mitigating or preventing disease, the FDA treats that as a drug claim. This November 5, 2020 warning letter to Quten Research Institute concerned CoQ10 and turmeric products and is cited only as an example of that rule; it does not address sleep products.
The NHS Borders guidance does not mention crystals, and they are not among the options in the table above.
Is sleep paralysis a demon or a spiritual sign?
Sleep paralysis has a long history in folklore. The NHS Borders guidance says it “has been blamed on witchcraft, features in Shakespeare’s writing and more recently is thought to be the explanation for so-called ‘alien abductions’.” It adds: “We now have a scientific explanation for it.” This page covers the medical and research side, not religious or spiritual teaching, including what any scripture says about it.
What is still not known?
Several things are still open. The 2018 review says the causes are unknown. The 2024 Cureus review says sleep paralysis “remains poorly understood by many” and calls for further research. Genetic and circadian links are described as possible, not established. Estimates of how common it is also differ between sources.
How can I get help with sleep issues?
Start with your GP or pharmacist, and ask a clinician about treatment options. The Cleveland Clinic says that if you are having trouble falling asleep on a regular basis, “it’s worth scheduling an appointment with a sleep medicine specialist.” For everyday changes, the sleep hygiene and mental health guide covers routine and how it connects to mood, and Anxiety Depression and Mood explores the link between worry and sleep.
What should you bring to an appointment?
- How often episodes happen, and whether they are getting more frequent
- Whether they happen when you are lying on your back
- Any daytime sleepiness or loss of muscle strength
- Stress, fear or trauma and how they affect your sleep
- Your usual sleep schedule, including shift work or jetlag
The NHS Borders guidance says that if you have significant psychological stress from the sensation, you should discuss it with your doctor.
By the Global MH Summit Research Team
This article is for general information purposes only and does not constitute medical advice. Consult your doctor or qualified healthcare provider before making changes to your health routine.