Many people who experience sleep paralysis see frightening hallucinations some call "sleep paralysis demons." - Illustration by Leah Abucayan/Alberto Mier/CNN Baland Jalal lay in bed terrified, ...

Sign up for CNN’s Sleep, But Better newsletter series. Our seven-part guide has helpful hints to achieve better sleep. Baland Jalal lay in bed terrified ...

Have you ever opened your eyes in the middle of the night and realized you could not move a single part of your body? Your brain feels awake, but your arms, legs, even your voice, feel locked. Some ...