Depression is a mental disorder characterized by a low confidence low self esteem and by a loss of interest in enjoyable activities.Depression adversely affects a person's family,work or school life,sleeping and eating habits and general health.In the United States,around 3.4% of people with major depression commit suicide,up to 60%.The depression diagnosis relies on the report of patient or the report of relatives and friends.Checking the mantal symptoms will are not tested in the laboratory.People with depression often find the most is the age range 20 to 30 years.