Adding the cold, dark days of winter on top of holiday stress can do a number on a person's mental health. It could lead to seasonal affective disorder ― a type of depression that's related to changes in seasons.
Dr. Craig Sawchuk, a Mayo Clinic psychologist, says one of the most effective treatments for seasonal affective disorder is exposure to artificial light or light therapy.
For those looking to flip the switch on feeling down during the winter months, Dr. Sawchuk suggests giving light therapy a try.