Unlike spring fatigue or autumn blues, seasonal depression, also known as seasonal affective disorder, or SAD, is a state that does not go away quickly. If you experience symptoms of fatigue and sleepiness, but they pass within 10 days, then your body simply adjusts to the change of the seasons. To talk about seasonal depression, a sharp mood drop has to be observed for at least 2 weeks, and repeatably over the years.
Experts aren’t sure what causes SAD, but consider the lack of sunlight and vitamin D as the most possible reason. Another explanation is the drop in serotonin — a brain chemical that affects mood. Along with this, there is a decrease in melatonin, which is why sleep problems arise.
Major stressful events can also trigger seasonal depression. And such events are not necessarily bad. They may be happy occasions, such as a wedding or a childbirth.
Everything about the seasonal depression, how to recognise it and, even more importantly, how to deal with it, you will find out in the interview with psychotherapist Dimitrina Mitreva.