5 Facts about Nightmares
Everyone has had a nightmare. Maybe it was grandma’s dinner, or pent up frustrations. Regardless, they are disturbing, and here are face facts you should know. Nightmares are caused during rapid eye movement sleep after you first fall asleep. It continues every 90 minutes.
Live Science wrote that having nightmares is necessary to survive or “they probably would have been done away with by evolution," said Harvard University's Dr. Deirdre Barrett. Barrett theorizes that nightmares act as the brain's way of focusing a person's attention on issues they need to address.”