Seasonal Depression: Common But Treatable

If shorter days and shifts in weather zap your energy and make you feel blue, you’ve got classic symptoms of a seasonal mood disorder. Seasonal affective disorder (SAD) is a form of seasonal depression triggered by the change in seasons that occurs primarily in winter. Why do some people get SAD? Experts aren’t certain, but some think that seasonal changes disrupt the circadian rhythm: the 24-hour clock that regulates how we function during sleeping and waking hours, causing us to feel energized and alert sometimes and drowsy at other times.

Another theory is that the changing seasons disrupt hormones such as serotonin and melatonin, which regulate sleep, mood, and feelings of well-being. About 4 to 6 percent of U.S. residents suffer from SAD, according to the American Academy of Family Physicians, and as many as 20 percent may have a mild form of it that starts when days get shorter and colder. Women and young people are more likely to experience SAD, as are those who live farther away from the equator. People with a family history or diagnosis of depression or bipolar disorder may be particularly susceptible.

"It is important to treat SAD, because all forms of depression limit people's ability to live their lives to the fullest, to enjoy their families, and to function well at work," says Deborah Pierce, MD, MPH, clinical associate professor of family medicine at the University of Rochester School of Medicine and Dentistry in Rochester, New York. Here are a few SAD treatment options you might want to consider.