Delayed Sleep Phase Disorder: A Primer
2 min readNov 15, 2019
This is not a substitute for professional medical advice.
Delayed sleep phase disorder (DSPD), a.k.a. delayed sleep phase syndrome (DSPS) or delayed sleep-wake phase disorder (DSWPD), is a primarily genetic condition where one naturally falls asleep and wakes up later.
There is no scientific consensus on how common DSPD is. It is much more common in adolescents, probably…
