Seasonal affective disorder (SAD) is a depressive mood disorder that affects people only at certain parts of the year. It mostly affects people in the winter months, after daylights savings, when it gets dark very early in the day. The lack of light that most people are exposed to during this part of the year can create feelings of sadness, a lack of motivation, the desire to sleep a lot, and other symptoms synonymous with depression.
The thing that makes SAD unique from depression is that it is not year round. It affects as much as 3% of people inthe US, with lower energy, a lack of concentration and irritability, and sleeping issues. Continue reading to learn more about SAD's effect on sleep.
