Worries about Seasonal affective disorder begin as days grow short

(KTVI)- As the days gets shorter and the seasons change, many people get a case of the "Winter Blues". But for some, it's more serious than that. Seasonal affective disorder (SAD) is a type of depression related to the change in seasons.

For most, symptoms start in the fall and continue into the winter, zapping energy and making sufferers feel hopeless.