Depression.

Depression is a psychiatric disorder characterized by feelings of worthlessness, guilt, sadness, helplessness, and hopelessness. It is different then normal sadness or grief from the loss of a loved one because it is persistent and severe. Clinical depression has many related symptoms trouble sleeping, eating disorders, withdrawal and inactivity, self-punishment, and loss of pleasure. People that are depressed do not like to do things they may usually like to. Surveys that have been taken that …

…of manic-depressive illness. In small doses it is also used to regulate the mood fluctuations of this bipolar disorder. I also found a little amount on something called electroconvulsive therapy, or ECT, is considered most effective for depressions that do not respond to drug therapy. ECT is not widely used and is very controversial. It brings rapid relief from severe depression and can often prevent suicide. But it did not tell me how it works.