It is a mood disorder in which a person feels persistently sad and has a loss of interest in everyday activities. Many people feel low, upset, and sad from time to time in their lives. It happens to everyone at different times of their lives but being sad is not the same as being depressed. In depression, there is constant sadness accompanied by feelings of hopelessness continuing for weeks together which interfere with doing everyday activities and affect one’s personal, and professional life. This is indicative of clinical/ major depression that requires treatment.