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When do nightmares occur?

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Sleep is divided into two types: rapid eye movement (REM) and nonrapid eye movement (non-REM). REM and non-REM sleep alternate in 90- to 100-minute cycles. Most dreaming occurs during REM sleep. Nightmares usually occur in the middle of the night or early morning, when REM sleep and dreaming are more common.

From: Nightmares WebMD Medical Reference

Reviewed by Nayana Ambardekar on January 20, 2018
Reviewed by Nayana Ambardekar on January 20, 2018

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What causes children's nightmares?

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