Depression is a complex illness related and everyone’s has a different experience of it.
When a psy makes a depression diagnosis, he may use terms such as clinical, unipolar, bipolar, melancholic, major, seasonal, psychotic, neurotic, dysthymic disorder or endogenous to describe it.
Generally, there exist two depressive disorders - endogenous depression, which is is related to manic-depressive illness and neurotic depression. In actuality, the differentiation between these two entities is considerably tricky, but this is expected when we consider that any primary psychiatric disturbance can be linked to secondary or reactive features and of these, depression is one of the most common.
Statistically 40% of people who suffer from major depression are endogenous and 60% neurotic or reactive depression. Leaving behind the figures for a moment, it is the endogenous component that’s integral, for the remainder is a reaction to it.
Approximately 15% percent also show symptoms of psychotic depression.