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What are The Strange Hallucinations When You Fall Asleep? - Understanding Hypnagogic Hallucinations


What are Hypnagogic Hallucinations? (aka hypnagogia)

Have you ever fallen asleep and experienced strange sounds, perhaps voices or the sound of a slamming door?


Or maybe you've had sudden visions, possibly flashing colours or fully formed scenes?


Stranger still, perhaps you felt your body contort into peculiar and impossible shapes?


If so, these are not dreams, but a an exotic state of mind called hypnagogic hallucinations.

Hypnagogic hallucinations (aka hypnagogia), are the vivid sensory experiences that occur during the transition from wakefulness to sleep. These strange swirling patterns, fleeting scenes, auditory hallucinations, bodily distortions and "mini-dreams" can be an indicator of the quality of your sleep hygiene and overall sleep health. The exact cause of these hallucinations remains uncertain, but most experts agree that they are generally a sign of disturbed sleep.


The term hypnagogic was originally coined by Alfred Maury (1848) to name the state of consciousness during the onset of sleep, from Greek hypnos "sleep" and agōgos "leading", or in other words "leading into sleep". Today we'll explore the relationship between hypnagogic hallucinations and sleep hygiene, providing insights on how to improve your sleep patterns for better physical and mental well-being.



Causes and Effects of Hypnagogic Hallucinations

Although the specific causes of hypnagogic hallucinations are not yet completely understood, they are generally seen as a sign of disrupted sleep.





These hallucinations can be useful for inducing lucid dreams in some cases, and lucid dreamers are often more prone to noticing hypnagogia due to increased alertness.


However, experiencing hypnagogic hallucinations regularly is likely a sign of poor sleep hygiene.

Sleep Hygiene and Hypnagogic Hallucinations: What to Watch Out For

How often you experience hypnagogic hallucinations can be an indicator of the quality of your sleep hygiene.


Below is a guide to the meaning of hypnagogic frequency and what it means to you:

  1. Every night: If you're experiencing hypnagogic hallucinations every night, some aspects of your sleep hygiene may be lacking. Common culprits include inconsistent bedtimes, screen use before sleep, an uncomfortable sleep environment, anxiety, high caffeine consumption, or unresolved trauma. Frequent hypnagogic hallucinations may indicate sleep deprivation, so it's essential to address these issues.

  2. Weekly: Weekly hypnagogic hallucinations are typically caused by occasional lapses in sleep hygiene. Inconsistent bedtime routines or noisy environments (including pets) can be contributing factors. Lifestyle factors such as work or school-related stress, relationship tensions, or substance or medication use can also play a part. This frequency of hypnagogic hallucinations is relatively normal, especially for those with active social lives.

  3. Monthly: Experiencing hypnagogic hallucinations once a month is considered normal, usually resulting from occasional disruptions to your sleep hygiene. Late-night events or adjusting to a new time zone can throw off your sleep patterns, and occasional stressors like deadlines or personal issues can contribute. This is the frequency most people should expect.

  4. Rarely or Never: If you rarely or never experience hypnagogic hallucinations, you may have excellent sleep hygiene. Maintaining a consistent sleep schedule, a calming bedtime routine, and a relaxing sleep environment all help minimize hypnagogia. However, some people may be naturally less susceptible to hypnagogic hallucinations due to genetic and psychological factors.

Learning from Hypnagogia

Understanding the connection between hypnagogic hallucinations and sleep hygiene is essential for maintaining good sleep health.


By being mindful of the frequency and circumstances surrounding these hallucinations, you can take steps to improve your sleep quality, ensuring a more restful night.



While hypnagogia can be a fascinating side-show of lucid dream practice, excessive hypnagogia is a warning sign that you may be pushing things a little too hard. Prioritizing good sleep hygiene is vital for maintaining physical and mental well-being, as well as long term lucid dream practice, so pay attention to the signs and adjust your habits accordingly for a better night's sleep.

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