Most dreaming happens during REM sleep, which makes up 20–25% of the night; if vivid dreams keep leaving you exhausted, scientists say the real culprit may be something else, keeping you from restorative sleep

Not everyone who closes their eyes and hits the bed at night goes to sleep. Some end up transitioning into a dream-like state that has them waking up while feeling hazy, lazy and heavy, with no feelings of rest and freshness.

Raccontata datimesofindia.indiatimes.com