What Causes Seasonal Affective Disorder?
Also known as seasonal or winter depression, SAD is thought to be caused by reduced exposure to sunlight, which can disrupt the body’s internal clock and lead to imbalances in brain chemicals. Serotonin, the happiness hormone, and melatonin, a sleep-related hormone, are both proven to be lower in those suffering from SAD.
These imbalances can affect mood and sleep, leading to decreased mood and motivation. SAD can also negatively impact the personal, professional, and social aspects of your life. This disorder has been studied at length, and there are many effective, comprehensive therapies available to help you cope in moments of darkness. Remember: the sun will come out again.
What Are the Causes of Different Variations of SAD?
Seasonal affective disorder is not a one-size-fits-all diagnosis. There are variations that can alter the severity of your symptoms and dictate the best therapy for you. The most common factors that contribute to SAD are sensitivity to changes in sunlight exposure and disruptions to circadian rhythms, which can affect the happiness and sleep hormones, serotonin and melatonin.
There is also evidence to suggest that there may be a genetic predisposition component to SAD. Statistically, women experience SAD more frequently than men. Additionally, location and climate can affect the severity of SAD. If you live in a colder climate, you are more likely to experience SAD than someone who does not. Additionally, stress and other comorbid mental health conditions, such as bipolar disorder, can also play a role.