What is post-traumatic stress disorder/ptsd?

PTSD. Ptsd is a type of anxiety disorder that can develop after seeing or experiencing a traumatic event that involved the threat of injury or death. It can happen in all ages --after natural disasters such as floods, fires, and earthquakes, or other events such as rape, domestic violence, war, terrorism, or other assaults. History of previous trauma may increase likelihood of ptsd after a new event.
PTSD. Ptsd may occur if one is involved in life threatening or horrific experience (s). It leads to hypervigilance & a constant sense of being unsafe. One goes into fight or flight mode with little provocation & avoids people, places or things that trigger sxs. The trauma replays through dreams, memories, flashbacks & intrussive thoughts/ feelings. Ptsd deeply effects families. It can impact the soul.
Symptom Clusters. The diagnosis of PTSD requires four sets of symptom clusters, including intrusion or re-experiencing, avoidance of people, places, and things associated with the trauma, negative alterations in mood or thought, and hyper-arousal. Less commonly, dissociation may occur where feelings of being disconnected from oneself or the sense that that one's surroundings aren't real are experienced.
Threat of death. PTSD is a post trauma reaction to being in the situation of impending real or perceived loss of life, or inability to is scape. Examples of this would come from being in combat situations, or severe physical or sexual abuse. There are degrees of PTSD, it is not a matter of either the patient does or does not have it, it's not all or none.