Depression is a significant and consistent negative mood which interferes with daily life. Common symptoms include feelings of guilt, worthlessness, or helplessness, irritability or restlessness, changes in eating, difficulty concentrating, decreased energy, and thoughts or attempts of suicide or self-harm.
Learn more about depression and its signs and symptoms here.
Bipolar Disorder (previously Manic Depression) is a complex disorder associated with distinct mood episodes which each occur independently for a period of time. Moods fluctuate between three states: mania, depression, and mixed. Mania consists of animated, self-confident, and reckless behavior. Depression consists of feelings of hopelessness, loss of joy, and decreased activity. Mixed episodes consist of manic and depressive symptoms during the same period, causing much distress to the person experiencing them. Not everyone with bipolar disorder experiences a mixed episode.
Learn more about Bipolar Disorder and its signs and symptoms here.