Post-Traumatic Stress Disorder (PTSD) is a mental health disorder that develops after exposure to a traumatic event such as war, natural disasters, serious accidents, physical or sexual assault, terrorism, or other life-threatening experiences. Not every person exposed to trauma develops PTSD, but those who do experience persistent psychological distress that affects their daily functioning. According to modern diagnostic frameworks, PTSD consists of several major domains or symptom clusters that help clinicians understand, diagnose, and treat the disorder effectively. The first domain is exposure to a traumatic event. This is the essential condition for the development of PTSD. The individual may directly experience the traumatic event, witness it happening to others, learn that it occurred to a close family member or friend, or repeatedly encounter details of traumatic events as part of professional duties, such as emergency responders or police officers. The trauma involves actual or threatened death, serious injury, or sexual violence. The second domain is intrusion symptoms, which involve the persistent re-experiencing of the traumatic event. Individuals may have distressing memories that occur involuntarily and repeatedly. They may experience recurrent nightmares related to the trauma or flashbacks in which they feel as though the traumatic event is happening again. Psychological distress and intense physical reactions can occur when they are exposed to reminders such as sounds, places, smells, or situations associated with the trauma. These intrusive symptoms often interfere with concentration, sleep, and emotional well-being. The third domain is persistent