The latter type, sometimes referred to as ‘clinical depression’, is defined as ‘a persistent exaggeration of the everyday feelings that accompany sadness’. If you have severe depression you may experience low mood, loss of interest and pleasure as well as feelings of worthlessness and guilt. You may also experience tearfulness, poor concentration, reduced energy, reduced or increased appetite and weight, sleep problems and anxiety. You may even feel that life is not worth living, and plan or attempt suicide. For more information visit Help for Depression