Winter is well and truly upon us. For many regions, this means miserable weather, less sunlight and darker days. Although we would much prefer our days to be filled with warmth and sunshine, many of us adapt to seasonal changes. But for others, the change in seasons may trigger a form of depression. First described in 1984 by Dr. Norman Rosenthal from the US, seasonal affective disorder (SAD), also known as seasonal adjustment disorder, is a form of depression that can occur at certain times of the year.
Learn more here: http://www.medicalnewstoday.com/articles/270059.php