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

Fatigue can signal many things. Here are some tips to help you decipher why you're wiped out and to regain your energy.

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.

Jan. 05, 2013