What are the sign of depression?

Depression: Depression is a mood disorder, the common type is major depressive disorder. Low or sad mood, at times irritability, sleep changes, appetite changes, low energy, hopelessness or helplessness, loss of interest in previously pleasurable activities. These symptoms typically should atleast have lasted two weeks or longer. Suicidal ideation or attempts are dangerous need immediate attention.

Many: Signs of depression include sad mood with loss of interest in activities you usually enjoy, for 2 weeks or more. Also changes in energy, appetite (either eating more or much less than usual), and sleep (either sleeping much more than usual or having disturbed sleep -- especially early morning awakening). Libido is often lost during depression. Please see a mental health professional for these.

2 general types: Generally there are two types of depression. The first is dysthymia, which is a chronic type of depression that varies little in intensity, and major depression, which varies in intensity a great deal.