Oneirophobia (from Greek όνειρο (oneiro), meaning "dream", and φόβος (phobos), meaning "fear") is the fear of dreams. It is discussed in The Dream Frontier, a book by Mark Blechner, a neuro-psychoanalyst at the William Alanson White Institute.

The fear is suffered due to experiences with frightening dreams (nightmares) or by negative events in the life affecting dreams. Sufferers try to avoid falling asleep.

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