Seasonal affective disorder (SAD) may be a style of depression that folks expertise at a selected time of year or throughout a selected season. Most folks area unit suffering from the amendment in seasons – it's traditional to feel additional cheerful and energetic once the sun is shining and therefore the days area unit longer, or to seek out that you simply eat additional or sleep longer in winter. However, if you expertise unhappy, the amendment in seasons can have a way bigger result on your mood and energy levels, and cause symptoms of depression that have a major impact on your everyday life.
Most of the patients with SAD become depressed in the winter, at least in part because of a phase delay in circadiac rhythms relative to the sleep/wake cycle. Seasonal mood symptoms suggests that genetic aberrations may underlie the various abnormalities, which cause SAD symptoms are Feeling sad, grumpy, moody, or anxious, Lose interest in your usual activities, Eat more and crave carbohydrates, such as bread and pasta, Gain weight, Sleep more but still feel tired, Have trouble concentrating. the drug Melatonin secretion occurs later in the night.
The mean prevalence of SAD is two times higher. Over all prevalence studies, the correlation between prevalence and latitude was not significant. A significant positive correlation was found between prevalence and latitude there was a trend in the same direction were estimated at 6.8%