The aim of this study is to analyze the causes of experiencing the feeling of loneliness from the perspective of the theory of psychic trauma. This paper is an analytical synthesis of the consequences of psychic trauma, among which is the feeling of loneliness with a clearly negative connotation. Synthesizing scientists' concerns in loneliness and psychotraumatology can be brought to a common denominator: when secure attachments between parents-children are severely disturbed, children experience an emotional chaos called - attachment trauma, which affects the psyche so that it is impossible to build healthy relationships of subsequent attachment, which is actually the feeling of loneliness. These children becoming adults spend their lives constantly looking for intimate connections with others, who did not have them with their parents, but who are doomed to failure with great disappointment. The situation can only be overcome by a psychotherapeutic process on attachment trauma.