Not everyone who goes through something traumatic develops PTSD
Most Australians will go through something genuinely traumatic at some point in their life. A car accident, the sudden death of someone close, a natural disaster, an assault. What surprises a lot of people is that most of them will not go on to develop post traumatic stress disorder.
How common is trauma, and how common is PTSD
The Australian Institute of Health and Welfare estimates that around 75 per cent of Australian adults have experienced a traumatic event at some point in their life (AIHW, 2026). The most common of these are the unexpected death of someone close, witnessing a serious injury or a body, and being in a life threatening car accident (AIHW, 2026).
Despite how widespread trauma exposure is, PTSD itself is far less common. National data puts lifetime PTSD prevalence at around 11 per cent of Australians, with women facing almost double the risk of men, at 14 per cent compared with 8 per cent (AIHW, 2026).
In other words, going through something awful does not automatically mean something is wrong with you if you recover in the weeks that follow. For most people, distress after a traumatic event eases naturally, especially with support from family and friends (AIHW, 2026).
This distinction matters because a lot of people quietly worry that reacting strongly to a frightening event means they are somehow broken, or that they should have bounced back faster. Feeling shaken for a while afterwards is simply how a healthy nervous system responds to danger.
So what makes the difference
There is no single factor that decides who develops PTSD and who does not, but a few patterns show up consistently in the research. Repeated or prolonged exposure raises the risk considerably. Firefighters who had retired from the job showed PTSD rates more than double those of currently serving firefighters, most likely reflecting years of cumulative exposure rather than any single incident (AIHW, 2026).
Certain groups also carry a higher likelihood of trauma exposure in the first place, including people who have experienced homelessness, family and domestic violence, or discrimination, along with emergency service workers and veterans (AIHW, 2026). None of this is about blame or fault. It simply reflects how much exposure, support and personal history shape the way a person's nervous system processes what happened.
Signs it might be more than a normal stress response
A short period of distress, poor sleep or feeling on edge after something frightening is a normal reaction, not a disorder. It is worth speaking with someone if these signs persist for more than a month, or start disrupting daily life:
Vivid, intrusive memories or nightmares about the event
Avoiding places, people or conversations that bring the memory back
Feeling constantly on edge, jumpy or unsafe, even in calm settings
Emotional numbness or feeling disconnected from people you love
Trouble concentrating, sleeping or managing everyday tasks
These signs do not need to be dramatic to be worth attention. Many people describe it as feeling like a switch got flicked, where they seem fine on the outside but feel braced for danger underneath, long after the event itself has passed.
What actually helps
Effective treatment for PTSD exists and is well researched, and no one needs to carry it alone indefinitely. Trauma focused psychological therapies, including approaches informed by the Australian Guidelines for the Treatment of PTSD like EMDR, are considered first line care and can meaningfully reduce symptoms for most people (AIHW, 2026).
This is central to the work our psychologists at Valentia Health do with clients recovering from trauma, whether that trauma happened recently or many years ago. Sessions are available both in person at our Taringa clinic and via telehealth across Australia, and are often eligible for a Medicare rebate through a Mental Health Care Plan from your GP.
There is no set timeline for when trauma therapy should start. Some people come in within weeks of an event, others after carrying it quietly for years, and both are completely valid points to begin.
If this sounds like you
If something difficult has happened and it still feels present in your body or your thoughts, that is worth taking seriously, whether it happened last month or a decade ago. Recovery does not require you to relive every detail before you feel ready.
You can learn more or book an appointment at valentiahealth.com.au, or call our Taringa clinic to talk through what support could look like for you.
References
Australian Institute of Health and Welfare (2026). Stress and trauma, Mental health. https://www.aihw.gov.au/mental-health/topic-areas/health-wellbeing/stress-and-trauma
Phoenix Australia (2013). Australian Guidelines for the Treatment of Acute Stress Disorder and Posttraumatic Stress Disorder. https://www.phoenixaustralia.org/australian-guidelines-for-ptsd/
This post is for general informational purposes and is not a substitute for professional psychological advice. If you are in crisis, please contact Lifeline on 13 11 14 or call 000.