Post-traumatic stress disorder (PTSD) is caused by the stress response from a traumatic event that continues to recur through symptoms like flashbacks, bad dreams, and feelings of tension. PTSD disrupts the nervous system's ability to be present. Trauma manifests physically in the body through nervous system dysregulation rather than just being caused by the event itself. Healing from PTSD involves addressing medical, physical, emotional, linguistic, and spiritual aspects. Treatment may include inner dialogue with wounded parts of oneself, relaxation techniques, grieving, monitoring thoughts, and cultivating coherence in the mind and body.