Depression is an extreme low mood that lasts a long time and makes a person feel sad, irritable or empty. Many people, including many teens, have suffered in this way. A depressed person: ^ has much less energy to do activities ^ feels like nothing matters. ^ sees life in a negative way. ^ feels like it will never get better But depressed people do get better and depression does end. There are effective treatments and self-help skills to deal with depression. Health care professionals give depre