But it usually doesn't start in people younger than 20 years of age. The risk of SAD decreases for adults as they age. SAD is more common in northern regions of the United States. Winters are typically longer and harsher there.
Then, how long does sad last?
5 Warning signs of Seasonal Affective Disorder – and what to do. Seasonal Affective Disorder (SAD) is a type of depression that occurs at the same time each year. Although it can occur in spring or summer, it typically begins in late fall and lasts through the end of winter.
Similarly, what causes the winter blues?
The primary culprit of both the winter blues and SAD is the lower level of natural sunlight we are exposed to in the fall and winter. Less natural light can cause the following problems: Dips in serotonin, a neurotransmitter that regulates mood.
How does SAD affect you?
Seasonal affective disorder (SAD) is a type of depression that's related to changes in seasons — SAD begins and ends at about the same times every year. If you're like most people with SAD, your symptoms start in the fall and continue into the winter months, sapping your energy and making you feel moody.
What month is the most depressing?