1. By: Gina and Laurel

2. Definition Seasonal affective disorder is a condition of mild to severe depression brought on by winter.

3. Symptoms Some symptoms for SAD are excessive sleep, a craving for carbohydrates, fatigue, and weight gain.

4. Treatments Light therapy is exposing the patient to bright artificial light to compensate for the gloominess of winter. The also use antidepressants for some people.

5. Interesting facts A café in Helsinki, Finland, provides special lamps that simulate artificial daylight to keep customers from falling victim to SAD during the long winter days. Even in warmer climates, a series of overcast days may lead people to feel down or depressed.