Depression is a common disorder that causes people to experience a depressed mood, a loss of interest or pleasure in life events, feelings of isolation, guilt and low self worth. Our sleep patterns can be disrupted causing fatigue, low energy and poor concentration. Depression is more than simply feeling down or sad we all go through spells of feeling down but when you are depressed you feel persistently sad for weeks or months rather than a few days. Living with depression is difficult not only for the person who is suffering but also for family, friends and colleagues.