Feeling SAD?

Learn About Seasonal Affective Disorder

What is Seasonal Affective Disorder?

Seasonal affective disorder (or SAD) is a type of depression that occurs during the same season each year. It usually happens in the fall or winter, but some people may experience season-linked symptoms in the summer.

Signs & Symptoms Of Seasonal Affective Disorder

The list of signs and symptoms of SAD is the same as the list for major depression. However, with SAD, these signs and symptoms appear and disappear at about the same time each year.

The major symptom of SAD is a sad, despairing mood that is present most days and lasts most of the day, lasts for more than two weeks, and impairs the person’s performance at work, at school or in social relationships.

Causes of Seasonal Affective Disorder

SAD appears to be triggered by changes in the amount of sunlight. Researchers have several theories about how this happens. For instance, changes in light may upset a person's biological clock, which controls sleep-wake patterns and disturb neurotransmitter (e.g., serotonin, dopamine) functions.

Treating Seasonal Affective Disorder

If you or someone you know identifies with the signs and symptoms of SAD and wishes to receive support, our dedicated and supportive clinicians are here to help.

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