In-depth

Complications

Insomnia

Sleepless nights? Insomnia includes difficulty going to sleep, staying asleep or going back to sleep after you awaken. Insomnia may be temporary or chronic.

Symptoms

Fatigue

Treatments and drugs

Light therapy

Light therapy can improve symptoms related to seasonal affective disorder and several other conditions. Here's why and how it's used.

Aug. 01, 2015