Seasonal affective disorder: how to recognize it

With temperatures cooling and days getting shorter, some people may begin showing signs of seasonal affective disorder.

The mood disorder is more common in women and younger people, and with those who live in places with long winter nights, experts say. 

Symptoms include feelings of hopelessness, reduced energy and focus, social withdrawal, increased sleep, loss of interest in work or other activities, sluggish movements, increased appetite with weight gain, and unhappiness and irritability.