What Does Seasonal Affective Disorder Mean?

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Definition

Seasonal affective disorder (SAD) refers to episodes of depression that occur every year during fall or winter. Symptoms improve in spring and summer.


Alternative Names

Depression - winter; SAD


Causes, incidence, and risk factors

The disorder may begin in adolescence or early adulthood. Like other forms of depression, it occurs more often in women than in men.

Most people with the "winter blahs" or "cabin fever" do not have SAD. People who live in places with long winter nights are not...

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