There is a seasonal effect on our feelings, and for some this time of year may accentuate feelings of isolation and depression. Of course, there are other situations throughout the year that alter how we feel and how we handle those feelings, but winter can heighten our awareness of this issue. When you are depressed you may feel sad, anxious, or experience mood swings. You accentuate a negative view of yourself and the world, and may become pessimistic about the future.
Some people become self-critical, or have difficulty making decisions.
After ruling out an organic illness, these signs may indicate depression. Theorists speculate that depression may be caused by overly negative thoughts concerning your environment, yourself or the future, and may be triggered by a significant loss, e.g. a relationship or a life goal. This loss may stimulate a chain of negative appraisals which result in a depressed state. Some may be too dependent on external sources for a sense of meaning. With no focus outside of self, feelings turn inward.