Depression is a condition in which a person feels discouraged, sad, hopeless, unmotivated, or disinterested in life in general.
When feelings last for more than two weeks and interfere with daily activities such as taking care of family, spending time with friends, or going to work or school, it’s likely a major depressive episode.
Bipolar disorder, previously referred to as manic-depression, involves mood shifts from highs to lows. During the manic phase, a person may experience abnormal or excessive elation, irritability, a decreased need for sleep, grandiose notions, increased talking, racing thoughts, increased sexual desire, markedly increased energy, poor judgment, and inappropriate social behavior. During the depressive phase, a person experiences the same symptoms of major depression.