Shorter days and dark afternoons can trigger depression. Here's how to fight back
Summary
Seasonal affective disorder (SAD) causes recurring depression that often begins in fall and eases in spring or summer. Shorter daylight and darker afternoons may trigger symptoms; experts also recognize a milder form and a less-studied summer variety.Key Facts
- Millions of people are estimated to have seasonal affective disorder.
- SAD episodes typically begin in fall and ease in spring or summer.
- Shorter daylight hours can affect people prone to seasonal depression.
- The shift back to standard time brought darker afternoons across much of the United States.
- Experts recognize a milder form called subsyndromal SAD.
- Seasonal depression can also occur in summer, though less is known about it.
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