There are two broad categories for the treatment of depression
. One is the use of insight/behavioral methods. The other is biochemical.
consists of things like talking to someone (friend, priest, counselor) to determine how you feel, why you do what you do, blah blah.
The chemical approach is to give you drugs like Prozac
, or any of the SSRIs (selective serotonin reuptake inhibitors) to fix the "problem" in your brain chemistry.
At any rate, if you're feeling depressed, I hope you're feeling better soon!