What Is Sleep Paralysis

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Sleep paralysis is a temporary inability to move or speak that happens while falling asleep or waking up. You are aware of your surroundings, but your body does not respond. Episodes usually last from a few seconds to a couple of minutes and can feel terrifying, especially when they come with hallucinations, such as sensing a presence in the room, seeing shadowy figures, or feeling pressure on the chest. Sleep paralysis happens when the muscle relaxation of dream sleep continues briefly after the mind wakes. It is common, and many people experience it at least once. It is not dangerous, and it often becomes less frequent when sleep improves.

What Happens in Sleep Paralysis

During rapid eye movement (REM) sleep, when most vivid dreaming happens, the brain temporarily relaxes most muscles so that you do not act out your dreams. In sleep paralysis, you become conscious while this muscle relaxation is still active. Dream imagery can also blend into waking awareness, which explains the hallucinations.

Common Experiences

• Being unable to move or speak while awake and aware
• Sensing a presence or intruder in the room
• Seeing or hearing things that are not there
• Chest pressure or a feeling of difficulty breathing
• Intense fear or dread

These experiences have been described across many cultures and have often been explained through folklore.

Why It Happens

• Sleep deprivation and irregular sleep schedules
• Shift work and jet lag
• Stress and anxiety, as described on the page about how sleep and mental health affect each other
• Sleeping on your back, which some people find makes episodes more likely
• PTSD and panic disorder, which are linked to higher rates
• Narcolepsy, a sleep disorder in which sleep paralysis can be one feature, alongside excessive daytime sleepiness
• Family history

Sleep Paralysis Across Cultures

Sleep paralysis has been described for centuries in many cultures, often through stories of spirits or creatures sitting on the chest or visiting at night. These interpretations made sense of a frightening experience before the science of sleep was understood. Today, knowing that sleep paralysis is a recognized, harmless sleep event can be reassuring in itself. Research suggests that how people interpret episodes affects how distressing they feel. People who believe episodes are dangerous or supernatural tend to experience more fear, while those who understand what is happening often find episodes less frightening and shorter. Learning about the mechanism, and reminding yourself during an episode that it will pass, is one of the most effective ways to reduce the fear.

What It Is Not

Sleep paralysis is not dangerous, and it does not mean you are losing your mind. The chest pressure does not mean you cannot breathe, because breathing continues automatically. It is also different from a nighttime panic attack, although fear during an episode can trigger panic, as described on the page about waking up with panic attacks at night.

What Helps During an Episode

• Remind yourself what it is. "This is sleep paralysis. It will pass."
• Focus on small movements. Try wiggling a finger or toe, or moving your eyes.
• Slow your breathing. Calm breathing can reduce fear.
• Do not fight the paralysis. Struggling can increase fear, while relaxing often helps the episode end sooner.

Reducing Episodes

• Get enough sleep on a regular schedule.
• Manage stress and anxiety during the day.
• Try sleeping on your side.
• Limit alcohol and late caffeine.
• Follow good sleep habits, as described on the page about sleep hygiene strategies that help.

When to Get Help

See a physician if episodes are frequent, distressing, or come with excessive daytime sleepiness or sudden muscle weakness, which may suggest narcolepsy. If fear of sleep paralysis is making you anxious about going to bed, or if episodes are linked to trauma, therapy can help, including CBT approaches for sleep and anxiety.

Getting Support at Pacific Maple Psych Centre

If sleep paralysis is frequent or frightening, support can help you reduce episodes and sleep with less fear.