Seasonal affective disorder (SAD) is a form of depression that occurs seasonally. Treatments include medications and therapies such as light therapy. Follow the links below to find WebMD's comprehensive coverage about what causes SAD, how to treat it, and much more.
Seasonal Affective Disorder (SAD) Diagnosis and Treatment
Think you might have seasonal affective disorder (SAD)? Find out how doctors diagnose it and what treatments work.
Seasonal Affective Disorder (SAD)
Learn more about major depressive disorder with seasonal pattern, formerly known as SAD, including causes, symptoms, and treatment for seasonal depression.
Questions and Answers About Winter Depression
If your mood worsens when winter approaches, you could have seasonal depression, also called seasonal affective disorder or SAD.
Tips for Summer Depression
Summer depression is more common than you may think. WebMD explains why you might feel more stressed and sad in the warmer months -- and offers coping tips.
Beating Winter's Woes
If your mood is as cold and dark as your landscape, you're in good company. But here's how you can ease that seasonal slump.
What is Seasonal Affective Disorder/Winter Depression?
Winter depression is still a mystery to scientists who study it. But researchers agree that people who suffer from seasonal affective disorder are particularly sensitive to light, or the lack of it.
Fending Off Depression Symptoms in Winter
Up to 3% of Americans may suffer from depression in winter. Some have seasonal affective disorder, or SAD, which only occurs in winter. Others may feel depressed year round, but worse in winter.
Sunshine for Seasonal Affective Disorder
As winter approaches and the days get shorter, millions of people once again develop the sadness and loss of energy that is characteristic of seasonal affective disorder. Find out what's behind this mysterious condition and what can be done about it.
Slideshows & Images
Slideshow: Holiday Depression Triggers
10 holiday depression and stress triggers, and ways to cope. From anxiety over bills to social commitments and travel, see how to manage holiday stress.
Slideshow: A Closer Look at Depression
What is depression? WebMD provides information on symptoms, tests, and treatments for many types of the disorder.