The 5 Stages of Sleep Deprivation

Stage 4: Awake for 72 hours

After 3 days of sleep loss, your urge to sleep will get worse. You may experience more frequent, longer microsleeps.

The sleep deprivation will significantly impair your perception. Your hallucinations might become more complex. You may also have:

  • illusions
  • delusions
  • disordered thinking
  • depersonalization

Stage 5: Awake for 96 hours or more

After 4 days, your perception of reality will be severely distorted. Your urge for sleep will also feel unbearable.

If you miss so much sleep that you’re unable to interpret reality, it’s called sleep deprivation psychosis.

Typically, sleep deprivation psychosis goes away once you get enough sleep.

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