Seasonal affective disorder (SAD) is a form of depression that occurs seasonally. It is triggered by the change in seasons and usually occurs during winter, possibly due to the lack of sunlight. This condition affects more than 500,000 individuals annually and peaks around the same time each year. For the most part, symptoms of seasonal affective disorder, which often include chronic fatigue, depression, and other psychological disturbances, begin in the fall and continue throughout the winter months. This condition may also occur during the spring or early summer, but these cases are far less common.
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Seasonal affective disorder symptoms can be improved by using a light therapy box, which gives off light similar to sunshine. Therapy lightboxes contain light that is much brighter than regular light bulbs. They also give off light in different wavelengths. Light therapy is thought to affect brain chemicals linked to mood, easing symptoms of seasonal affective disorder. Sitting in front of a light therapy box for thirty minutes per day can suppress the release of melatonin by stimulating the bodyâs circadian rhythms. Research shows light therapy is most effective in the morning.
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