If you regularly have a hard time getting restful sleep, you may need a sleep study. Also called polysomnography, a sleep study is a test that's used to diagnose sleep disorders. The good news? A ...

It might be worth working a little bit harder to get that much-desired, but often elusive, good night's sleep. Deep sleep clears the mind of waste just as a "dishwasher" cleans dirty plates and ...

(CNN) — Do you get enough shut-eye? We know a good night’s sleep is essential for health, yet many do not consistently get enough of it. About 1 in 3 American adults do not regularly get recommended ...

Obstructive sleep apnea, a condition that causes lower oxygen levels during sleep, is linked to degeneration of brain regions associated with memory through damage to the brain's small blood vessels, ...

Sign up for CNN’s Sleep, But Better newsletter series. Our seven-part guide has helpful hints to achieve better sleep. A restless night may leave you feeling tired ...