Someone experiencing depression due to some factors that affected it. The causes of depression are innate factors or genetic factors, stress factors, personality factors and environmental factors.
Are visible, people experiencing depression can be seen in its markings. Signs someone is experiencing depression, namely, his mood always drop and ugly, for example the gloomy, sad, crying easily, and could not sleep.
If they can sleep, get up the next day when his body is not fresh, could no longer enjoy things that were once tolerated, not passionate, energetic and not sluggish. If depression is severe then didn't want to eat, do not want to take care of themselves and so on.
If the people around us we experience this sort of thing, it's good if the talk from the heart to the heart. We asked what makes it that way, no need to go directly to a psychologist or psychiatrist if it can still be handled on its own.
But when his attitude is irrational, disturbing others, sad and gloomy was clear and did not want to do anything should be taken to a mental hospital.
As a sign of this kind if not treated by a psychiatrist or someone who's an expert then could have unwanted things happen such as committing suicide.