What is sleep paralysis

What it feels like

People describe being awake and aware of the room, unable to move or speak, frequently with a sense of pressure on the chest and difficulty taking a deep breath.

Many also experience hypnagogic hallucinations: a presence in the room, a figure at the bedside, footsteps, voices, or a feeling of being held down. These can be extremely vivid.

The reason they feel real is mechanical rather than mysterious. You are partly in REM, where dreaming happens, while conscious and perceiving your actual bedroom. Dream content is being overlaid on real surroundings, which is why it does not feel like a dream.

Episodes typically last seconds to a couple of minutes, and they end on their own or when someone touches you.

How common it is

Sleep paralysis is common. A substantial proportion of people experience it at least once, and it is more frequent in students, shift workers and anyone with irregular sleep.

It has been recognised across cultures for centuries, and many cultures have a traditional explanation involving a presence or figure, which reflects how consistent the experience is rather than anything supernatural.

For most people it happens rarely. For some it is recurrent, and that is worth discussing with a GP.

What makes it more likely

Sleep deprivation. The strongest and most consistent factor.

Irregular sleep timing. Shift work, jet lag, weekend lie-ins that shift your body clock.

Sleeping on your back. Episodes are reported more often in this position.

Stress and anxiety.

Alcohol, which fragments REM and produces rebound later in the night.

Narcolepsy, where sleep paralysis is one of several features. Frequent episodes alongside heavy daytime sleepiness or sudden muscle weakness triggered by emotion should be raised with a GP.

What to do during an episode

Nothing you do makes it end faster in any reliable way, and knowing what it is reduces the fear substantially, which is the useful part.

Remind yourself what is happening. It is temporary, it is harmless, and it will end.

Focus on breathing normally. The chest pressure sensation is part of the experience rather than an actual breathing problem.

Try small movements. Fingers, toes, or eye movements are frequently possible before larger muscles respond, and many people find this helps break it.

Do not fight it hard. Struggling tends to increase panic without shortening the episode.

Reducing how often it happens

All of this is ordinary sleep advice, which is the point: the condition responds to sleep regularity more than to anything specific.

Get enough sleep. Deprivation is the clearest trigger.

Keep a consistent wake time, seven days a week, which is more effective than a consistent bedtime.

Try sleeping on your side if episodes cluster on your back. A body pillow to lean into makes the position easier to hold, and a folded duvet tests the idea for nothing.

Reduce evening alcohol.

Address the anxiety, which is worth taking seriously because the experience itself causes anxiety about going to sleep, and that loop makes episodes more likely.

When to see a GP

Frequent episodes, particularly if you are becoming anxious about sleeping.

Heavy daytime sleepiness alongside it, or falling asleep unintentionally during the day.

Sudden muscle weakness triggered by strong emotion, such as laughter, which alongside sleep paralysis can indicate narcolepsy.

There is no need to be embarrassed raising it. It is a recognised and well understood phenomenon.

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