The common type of depression is normally caused by the change in seasons and the lack of daylight hours.
Symptoms include sadness, loss of interest, fatigue and fluctuating appetite.
Psychologists say a lack of sunlight can impact a person's vitamin D levels, their serotonin, behavior, sleep cycle and memory.
"It's very easy to kind of hibernate during this time of year and you want to make sure that you engage in social outlets. Especially this time of year, with symptoms beginning and intensifying throughout the winter and even into the spring," said Adam Borland, a clinical psychologist at the Cleveland Clinic.
Borland says connecting with others and sticking to a daily routine can help people suffering from SAD.
Exercising can be beneficial as well and working out outdoors can help people get natural sunlight.
For those who are unable to exercise outside, it's suggested they purchase a
light box to boost their light exposure, which can help regulate sleep cycles.
Talk therapy and or medication can also help to treat anxiety or depression.