Mental disorders have now played an increasingly crucial part in triggering disability, among which depression is especially worth attention. Its prevalence has been very high worldwide, especially in undeveloped and unwealthy countries and areas. This mental disorder can be found in a wide range of age groups, but adolescents have a significantly high prevalence. Adolescents are in a very turbulent phase where individuals' psychosocial, physiological, etc., leave them very unstable and vulnerable. They are more subjected to this mental disorder than other population groups such as children or adults. Meanwhile, vast quantities of social factors can also trigger this mental disorder. Symptoms of this mental disorder vary and are mainly related to broken spirits, e.g., low esteem, low mood and lack of interest, and even suicide in individuals, thus creating significant loss to individuals, their families, or even society. Therefore, this mental disorder is worthwhile paying attention to, either the cause or the treatment methods. Physiological factors, as stated above, influence the mental condition of adolescence, but social factors are also critical in forming mental illness. Four social factors and how they lead to depression will be present below.