OSCAR BURRIEL / SCIENCE PHOTO LIBRARY OSCAR BURRIEL / SCIENCE PHOTO LIBRARY
Sadness or depression. Front view of the face of a teenage girl looking sad, lonely and depressed. Depression may be expressed in feelings of sadness, withdrawal, and reduced emotional well-being. In young children depression and loneliness occur less commonly than in adolescents and the elderly. Causes of depression in children and adolescents include neglect, bullying, child abuse, confusion resulting from the onset of puberty, and disruption to their family life.
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