Seasonal Affective Disorder (S.A.D)

Seasonal Affective Disorder (SAD) or 'winter blues' as it is known, affects some half a million people in Britain. Symptoms of SAD are depression, difficulty sleeping, overeating, lethargy, anxiety, loss of libido and reduced resistance to infection. Lack of bright daylight during the winter triggers this disorder. Bright daylight entering the eyes changes the brains chemistry - that in turn, controls our daily rhythms and moods. Our body produces melatonin, to make us drowsy at night time - and bright sunlight stops its production. Treatment of S.A.D includes going to a light, hot climate or regular light therapy.

See more mood disorders

This information is licensed for use by Wellbeing Information Systems Ltd ("WIS"), and protected by international copyright law. All rights are reserved. (email info@wisinfo.co.uk). The information provided by WIS is for guidance only. Whilst it is based upon the expert advice of leading professionals, and extensive research, it is not a substitute for diagnosis by a qualified professional. Always consult your doctor, pharmacist or qualified practitioner before making any changes or additions to prescribed medication.