Advanced sleep phase syndrome is a disorder in which the major sleep episode is advanced in relation to the desired clocktime, that results in symptoms of compelling evening sleepiness, an early sleep onset, and an awakening that is earlier than desired.

Advanced sleep phase syndrome is treated with chronotherapy or bright light therapy. Chronotherapy would involve a systematic advancement of bedtime until the desired bedtime is achieved.

Bright light therapy would involve inducing a phase delay and the light exposure must be in the early evening. There is not a lot of data about the effectiveness of light therapy for ASPS.

Any suggestions to prevent the Advanced sleep phase syndrome?