Clinical Aspects Seasonal depressions most commonly occur in winter and are associated with the decrease in daylight. Sleeping excessively, overeating, social withdrawal, fatigue, decreased libido, irritability and craving carbohydrates are common symptoms. Low motivation and cognitive difficulties are frequently present. Depressed mood often occurs following the onset of fatigue, increased sleep and appetite. Summers are remembered as times of high energy with the individual being more outgoing and needing less sleep, or just feeling motivated and interested in life.
Winter is dreaded, and warm sunshine longed for, since it brings hope and power.
I have noticed many of my patients with depression, although not clinically diagnosed with SAD, experience worsening of their symptoms during the winter, especially during prolonged gray, rainy periods. Symptoms of their depressive illness are worsened by decreased daylight. SAD differs from winter blues in severity. Significant depression lasts more than two weeks in winter. These individuals frequently will have consulted with a physician or therapist regarding seasonal change.