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Seasonal Affective Disorder commonly develops in late fall and may last through the winter. There is no specific cause for it, but a lack of sunlight is thought to have an impact on certain brain chemicals and circadian rhythm, which can lead to depression. (U.S. Air Force illustration by Airman 1st Class Jennifer Gonzales)
Bureau of Medicine and Surgery 7700 Arlington Blvd. Ste. 5113 Falls Church, VA 22042-5113 This is an official U.S. Navy website This is a Department of Defense (DoD) Internet computer system. General Navy Medical Inquiries (to Bureau of Medicine and Surgery): usn.ncr.bumedfchva.mbx.bumed-general-inquiries@health.mil