Traumatic memories are a complicated psychological phenomenon, where some experiences are never forgotten but can only be remembered in fragments. Traumatic memories are not as complete or coherent as regular memories. Even if its details are absent, the actual event can still make a strong impression. Trauma is the result of an extremely stressful, frightening or upsetting event that is hard to cope with or feel we have no control over. These experiences may be a one-time thing or repeated over time.