What is seasonal affective disorder (SAD)?

Prof. Swaran Singh

People with seasonal affective disorder (SAD) develop depression each winter. When spring arrives, the symptoms of depression settle down. Light therapy (sitting in front of a special bright light for a time each day) is an effective treatment in many cases. Other options for treatment are the same as for other types of depression - for example, antidepressant medication and cognitive behavioural therapy.

/health/seasonal-affective-disorder-leaflet