Otherwise known as SAD, this brand of depression rears its ugly head as fall fades into winter. Specifically, “SAD is a short-term depression that occurs during the colder months, coinciding with fewer hours of daylight,” says Life-Well’s Dr Michele Barton in an email to Bustle. “In my experience, there is usually an underlying mild to moderate anxiety and depression, which is compounded by the lack of light and an extreme dislike for winter.”