This document discusses mood disorders such as depression and bipolar disorder. It defines major types of depressive and bipolar disorders, their symptoms, and potential treatments. Depressive disorders include major depressive disorder, dysthymia, and depressive disorder not otherwise specified. Bipolar disorders involve alternating or mixed states of mania and depression, and include bipolar I, bipolar II, cyclothymia, and bipolar disorder not otherwise specified. Common treatments involve antidepressant medications, psychotherapy such as cognitive behavioral therapy, and family therapy.