Seasonal Affective Disorder
Seasonal affective disorder (SAD) refers to episodes of depression that occur every year during fall or winter. Symptoms improve in spring and summer.
CausesThe disorder may begin in adolescence or early adulthood. Like other forms of depression, it occurs more often in women than in men.
Most people with the "winter blahs" or "cabin fever" do not have SAD. People who live in places with long winter nights are not necessarily more likely to have SAD.
The cause of SAD is not known, but it is thought to be related to many factors, including:
A rare form occurs in the summer.
- Ambient light
- Body temperature
- Hormone regulation
SymptomsSymptoms usually build up gradually in the late autumn and winter months.
- Afternoon slumps with decreased energy and concentration
- Increased appetite with weight gain (weight loss is more typical of other forms of depression)
- Increased sleep and excessive daytime sleepiness (problems sleeping are more typical of other forms of depression)
- Lack of energy and loss of interest in work or other activities
- Slow, sluggish, lethargic movement
- Social withdrawal
- Unhappiness and irritability
I've observed most of these in me. Oh well. Here's a three-headed monkey.