Traumatic neurasthenia, also known as shell shock or battle fatigue, refers to a psychological disorder triggered by an extremely distressing or traumatic event. This condition is characterized by symptoms such as anxiety, fatigue, irritability, and sleep disturbances. While the term "traumatic neurasthenia" is widely recognized, there are alternative expressions that can be used to describe this condition. Some synonyms for this disorder include post-traumatic stress disorder (PTSD), combat stress reaction, acute stress reaction, and war neurosis. These terms highlight the mental and emotional toll experienced by individuals who have encountered overwhelming and traumatic situations, often linked to war, violence, or natural disasters.