DefinitionAdolescent depression is a disorder that occurs during the teenage years, and involves ongoing sadness, discouragement, loss of self-worth, and loss of interest in usual activities.See also:DepressionMajor depressionAlternative NamesDepression - adolescents; Teenage depressionCauses, incidence, and risk factorsDepression can be a temporary response to many situations and stresses. In adolescents, depressed mood is common because of:The normal process of maturing and the stress associated with itThe influence of sex hormonesIndependence conflicts with parentsIt may also be a reaction to a disturbing event, such as:The death of a friend or relativeA breakup with a boyfriend or girlfriendFailure at schoolAdolescents who have low self-esteem, are highly self-critical, and who feel li