I think I have delayed sleep phase syndrome (DSPS). I took the Automated Morningness-Eveningness Questionnaire and got some interesting suggestions I’d like to try....

A reader asks:  I think I have delayed sleep phase syndrome (DSPS). I took the Automated Morningness-Eveningness Questionnaire and got some interesting suggestions I'd like...

I have been suffering from chronic insomnia for several years. I have seen every doctor and tried every medication (both prescription and herb) imaginable...

A reader asks: I have been suffering from chronic insomnia for several years. I have seen every doctor and tried every medication (both prescription and...

For all of my adult life (I’m 40), my sleep/wake schedule has been very inconsistent, mostly because I sleep late when I can do...

A reader asks:  For all of my adult life (I'm 40), my sleep/wake schedule has been very inconsistent, mostly because I sleep late when I...

 I have been self treating with a light box successfully for several years. My AutoMEQ test directed me to a 545am wake-up time, and...

A reader asks:  I have been self treating with a light box successfully for several years. My AutoMEQ test directed me to a 545am wake-up...

Why do I always wake up at 4 a.m. no matter when I have gone to sleep?

A reader asks:  Why do I always wake up at 4 a.m. no matter when I have gone to sleep? Answer: You have a strong internal circadian...

 I’ve noticed that light therapy boxes (LTB’s) have uses for SAD, but I have heard that they can be effective with insomnia.

A reader asks:  I've noticed that light therapy boxes (LTB's) have uses for SAD, but I have heard that they can be effective with insomnia....

How can I determine the optimal number of hours of sleep for me? I have noticed that when I wake up 30 minutes earlier...

A reader asks: How can I determine the optimal number of hours of sleep for me? I have noticed that when I wake up 30...

Is it possible to have a rare case of extreme advance of sleep, which means you get tired, earlier and earlier in the day,...

A reader asks: Is it possible to have a rare case of extreme advance of sleep, which means you get tired, earlier and earlier in...

I’m in the midst of a chronobiologic Catch-22: I need to wake up earlier to use my light box (for depression) and to get...

A reader asks: I'm in the midst of a chronobiologic Catch-22: I need to wake up earlier to use my light box (for depression) and...

My goals are to regularize my sleep-wake cycle and treat some mild but persistent depression. At your suggestion, I took your Automated Morningness-Eveningness Questionnaire...

A reader asks: My goals are to regularize my sleep-wake cycle and treat some mild but persistent depression. At your suggestion, I took your Automated...