A little-known and poorly understood sleep disorder that occurs during the rapid eye movement, or REM, stage of sleep has ...

A 38-year-old man repeatedly tries to force his wife to have sex in the middle of the night but has no memory of his actions when he wakes up. A married woman in her mid-20s often tears off her ...

Stress, menstruation, and alcohol use are just a few factors that can trigger sleepwalking. For some people, sleepwalking can accompany other health conditions, including certain mental health ...

Even a single night of sleep trouble can feel distressing and lonely. You toss and turn, stare at the ceiling, and wonder how you’ll cope tomorrow. No wonder many people start to worry they’ve ...

Undiagnosed sleep disorders are causing millions of Americans to struggle for years. A nonprofit is dedicated to spreading ...

Sleep disorders affect an estimated 50-70 million Americans and are linked to cardiovascular disease, cognitive impairment, metabolic dysfunction, and increased accident risk. Now, sleep experts say ...

Add Yahoo as a preferred source to see more of our stories on Google. Past age 50, men are much more likely to have REM sleep behavior disorder than women. Jose Luis Pelaez/Stone via Getty Images ...