Post-traumatic stress is a psychological condition that can occur after experiencing or witnessing a distressing event. It is characterized by persistent and intrusive thoughts, nightmares, flashbacks, and intense emotional distress. Persons enduring post-traumatic stress may also avoid situations or places that remind them of the traumatic event. They may also experience difficulties in concentrating, sleeping, and relating to others. The symptoms of post-traumatic stress can significantly impact a person's daily life and functioning, causing a constant state of fear and anxiety.

Individuals with post-traumatic stress may also experience persistent negative thoughts or beliefs about themselves, others, or the world, and may have difficulty experiencing positive emotions. They may exhibit hypervigilance, feeling constantly on edge or easily startled, and may also have trouble concentrating or sleeping. Additionally, they may experience a sense of detachment from others and a decreased interest in previously enjoyed activities.