Depression is a serious clinical condition that is more than feeling blue for a few days but feeling completely hopeless and worthless for weeks at a time. Feelings of complete sadness, hopelessness or emptiness, persistent insomnia, lack of appetite, low motivation and loss of interest in things that normally bring pleasure are signs of depression. In some cases thoughts of death and suicide are where depression can lead you. If you have these feeling or think you might be suffering from depression, speak to you GP immediately. There are many effective treatments available for depression including cognitive behavioural therapy.