Depression is one of the most common mental illnesses among children and adolescents and can manifest itself in very different ways. It often occurs in connection with other mental illnesses. However, since phases of negative mood are a typical part of childhood and adolescence, it is often difficult to distinguish "normal" mood swings from the onset of depression. The symptoms can vary greatly, for example younger children often show tearful or angry behaviour, apathy, sleep and eating problems, nightmares and fear of abandonment. Later, symptoms of general sadness or a lack of emotions, strong self-criticism, concentration and memory disorders, restlessness, lack of joy, a drop in performance, problems at school and even suicidal thoughts can occur. Due to the often unclear symptoms, a psychotherapeutic or psychiatric diagnosis with subsequent treatment is very important.