Is your internal clock keeping you awake at night? Delayed sleep phase syndrome may be to blame, and it's more common than you think. Arielle Burton was an associate content manager on CNET's ...

June 14 -- FRIDAY, June 13 (HealthDay News) -- Having delayed sleep phase syndrome (DSPS) appears to be linked to irregular menstrual cycles and increased premenstrual symptoms in women, according to ...

We often read about, or may know someone—often a high school or college student—who stays up way too late and then has a very hard time getting up in the morning. When bedtimes and wake times both get ...

There are definitely “morning people” and “night owls” – but that’s usually a symptom of habits and sleep patterns that have been developed, not a legitimate syndrome. But it turns out there is some ...

Problems with our sleep and internal body clock can trigger or worsen a range of psychiatric disorders, according to a new review of recent research evidence. The review, published today [19 February] ...