Signs and Symptoms of SAD
Your Bad Mood Could Be Seasonal Depression — Here Are the Signs to Look Out For
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"Seasonal affective disorder is a type of depression that affects people at the same time each year, typically over the Winter. People have a circadian rhythm, or biological clock, that is driven by serotonin and melatonin levels and can be thrown off course by prolonged dreary weather," Dr. Yeager told POPSUGAR.