How do u no if u have deppression ?

Depressive symptoms: Symptoms of so called major depressive disorder include sadness, depression, lack of interests, apathy, low energy and motivation, guilty feelings, difficulties concentrating and paying attention, disturbed sleep and appetite. Depression may also be associated with suicidal thoughts and sometimes with psychotic symptoms. You can check this website http://www.Healthyminds.Org for more information.

2 kinds: There is a distinction between endogenous (or biochemical) depressions, which arise for no obvious reason (and are responsive to antidepressants), and exogenous (or reactive / situational) depressions, which result from external circumstances (and are not as responsive to antidepressants). If your mom died and you're upset, you can't take a pill to feel better; you have to grieve her loss...