Kinds of PTSD
PTSD can start in many different places. Whatever your story, your reactions make sense and help is there for you.
By the numbers
How often different events lead to PTSD.
By kind of event
Overall
Later & partial
One condition, many starting points
Why it helps to know what kind of event set things off.
PTSD can only develop after you go through, or see, something life-threatening. The VA notes that very intense or long-lasting trauma makes it more likely. Doctors don’t officially sort PTSD into “types” by event, but the kind of event can shape the memories, reminders and feelings that come with it.
A huge international study across 24 countries found that about 7 in 10 people go through at least one traumatic event in their lives. On average, only about 4 in 100 of those events led to PTSD. The risk was very different depending on what happened.
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In the international study, rape, sexual assault, kidnapping and physical abuse by a partner had the highest PTSD risk. These events were less common overall, but they led to a large share of all PTSD.
When someone harms you on purpose, it can shake your trust in people and in the world. That is one reason these events can be so heavy to carry.
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Motor vehicle accidents and natural disasters had a lower risk of PTSD per event in the international study. Because these events are common, they still affect a lot of people.
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The sudden, unexpected death of someone close was the single event linked to the most PTSD cases worldwide, simply because it happens to so many people.
Another study from the same surveys found that partial PTSD was more common after events that happened to loved ones, while full PTSD was more common after violence against the person themselves.
After an accident
Crashes, falls and injuries can leave the mind on alert.
Car crashes, workplace accidents, falls and other sudden injuries can all lead to PTSD. In the international study, about 2.6% of people in a motor vehicle accident developed PTSD.
After an accident, reminders are often everywhere: the road, the sound of brakes, the place it happened, or the injury itself. Avoiding them can feel like the only way to cope, but it can also make life smaller over time.
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Many people find it hard to get back in a car, drive the same road, or ride with others after a crash. Some avoid travel altogether.
Trauma-focused therapy can help you face these reminders in small, safe steps, at a pace you agree to. The “Therapies for trauma” guide explains how this works.
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People who were driving, or who feel they could have prevented an accident, often carry heavy guilt or shame. Those feelings can keep the memory raw.
Talking it through with a therapist can help you see what you could and could not have known in that moment. The “Witnessing a traumatic event” guide has more on guilt and “I should have done more”.
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When an accident leaves pain, scars or a disability, the body can keep bringing the memory back. Pain and PTSD can feed each other.
The “PTSD” guide has a section on pain and physical health, with ideas for caring for both together.
After assault or violence
When harm comes from another person, PTSD is more likely.
Violence from another person carries the highest risk of PTSD. In the international study, about 19% of rape survivors, 11.7% of people physically hurt by a partner, 11% of people who were kidnapped, 10.5% of people who were sexually assaulted, and 7.6% of people who were stalked developed PTSD.
Violence between partners and sexual violence made up less than 1 in 10 traumatic events in that study. Yet they accounted for over a quarter of all PTSD cases.
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The VA names sexual assault as one of the traumas that make PTSD more likely.
The “Sexual assault & rape” guide covers your choices in the first days, reporting, and healing. “Intimacy after sexual harm” covers closeness and relationships afterward.
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Physical abuse by a romantic partner had one of the highest PTSD risks in the international study.
When harm happens again and again, or starts in childhood, some people develop complex PTSD. The “Complex PTSD” guide explains the difference.
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After a physical attack, robbery or threat, many people feel on guard in public, jumpy at sounds, or scared to go out alone.
The “After danger or violence” and “After a crime, scam or harassment” guides cover the first days and weeks, and practical next steps.
After medical trauma
Serious illness, intensive care and frightening treatment can lead to PTSD.
Illness and medical care can be traumatic too. A sudden diagnosis, emergency surgery, a stay in intensive care or a frightening procedure can all feel life-threatening, because sometimes they are.
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A review of studies found that about 22% of intensive care survivors had significant PTSD symptoms, and about 19% were diagnosed with PTSD.
How sick someone was did not predict who got PTSD. Frightening or confusing memories from the ICU, like things that seemed real but weren’t, were one of the strongest links.
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A review of 24 studies found that about 12% of people had significant PTSD symptoms after a heart attack or similar heart event, and about 4% met full criteria for PTSD.
Some people become afraid of their own heartbeat or avoid activity because it reminds them of that day. Talking with your care team about this matters for both your heart and your mind.
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In the international study, about 4.8% of people whose child had a serious illness developed PTSD.
The “PTSD in children & teens” guide has a section on hospital stays and illness for both kids and their families.
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Birth can be one of the most intense medical experiences of a person’s life. When it feels out of control or dangerous, it can stay with you.
The “Hard or frightening births” guide covers this in depth, including partners who were there.
After a disaster
Most people recover. Some things make lasting reactions more likely.
Floods, fires, storms, earthquakes and mass violence can turn whole communities upside down. The VA says most people who are directly affected by disasters recover over time.
What makes lasting reactions more likely
- Being cut off from support, or having people minimize what you went through
- Being directly exposed: injured, threatened, or losing someone close
- Being separated from family (the biggest risk for young people)
- Feeling intense panic or horror during the event
- Losing your home or property, or being forced to move
What helps people bounce back
- Good coping skills and belief in your ability to get through
- Hope, from faith, outside help, or practical things like housing and work
- Strong support from people around you, one of the strongest keys to recovery
After any disaster, the Disaster Distress Helpline offers free crisis counseling 24/7. Call or text 1-800-985-5990.
After a sudden loss
When grief and trauma arrive together.
The sudden, unexpected death of a loved one is linked to more PTSD cases worldwide than any other event. About 5.4% of people who go through it develop PTSD, and because so many people face this kind of loss, it adds up to about 22% of all PTSD.
The VA describes how prolonged grief can sometimes be a mix of trauma reactions and the pain of separation. Both can include disturbing images of the death, avoiding reminders, and feeling numb or cut off.
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Grief is about longing, sadness and missing someone. Trauma reactions are more about fear, feeling on alert, and memories of how the death happened pushing in.
Many people after a sudden loss have some of both. A therapist can help you sort out what’s happening, without you needing the right words first.
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Research from the WHO World Mental Health Surveys found partial PTSD was more common after events that happened to loved ones, such as a sudden death.
Partial PTSD can still be heavy. See the section “Partial PTSD” below.
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- “After a suicide loss”, for the specific pain of losing someone to suicide
- “Different kinds of loss”, for many kinds of grief
- “Prolonged & complicated grief”, for grief that feels stuck
When PTSD shows up later
Symptoms can appear months or even years after the event.
PTSD symptoms usually start soon after a trauma. But the VA notes they may not appear until months or years later, and they can come and go over many years.
A review of 39 studies found that about 1 in 4 PTSD cases began more than six months after the event. In most cases, people had some milder symptoms first that later grew stronger.
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People sometimes feel they “should be over it” because so much time has passed. But delayed PTSD is a known pattern, and it does not mean you are weak or making it up.
Big life changes, new losses, or reminders like an anniversary can bring old feelings closer to the surface. The “Trauma: what it is & how it affects you” guide has a section on anniversaries and hard dates.
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Because delayed PTSD usually follows milder symptoms, it can help to notice changes like poorer sleep, more avoidance or feeling more on edge in the months after a trauma.
The “Noticing changes over time” worksheet in this guide can help you keep track.
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The “PTSD” guide has a section on trauma in later life, including how memories can return after retirement or other changes.
It is never too late to get help. Trauma therapy can work decades after the event.
Partial PTSD
You don’t need every symptom for it to matter.
Some people have strong trauma reactions that don’t meet every part of a PTSD diagnosis. Researchers call this partial or subthreshold PTSD.
In the WHO World Mental Health Surveys, 3.0% of trauma-exposed people had full PTSD, and another 3.6% had partial PTSD. People with partial PTSD had less distress than those with full PTSD, but still clearly more distress and trouble in daily life than people without these symptoms.
In a national study of U.S. veterans, about 22% had partial PTSD at some point in their lives, more than had full PTSD. They reported noticeably worse day-to-day functioning than veterans with few or no symptoms.
Other forms and where to read more
Complex PTSD, combat, dissociation and more, each with its own guide.
Some kinds of PTSD have their own guides in this app, because there is so much to say about them. Tap a card to see what each one covers.
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Shaking, fear, poor sleep and feeling unreal are common in the first days and weeks after a trauma. For many people, these ease on their own.
The “PTSD” guide has a section called “The first month after”.
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The VA notes that combat trauma makes PTSD more common among veterans.
See “Veterans: PTSD & combat stress” and “Veterans: family & partners”.
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Complex PTSD includes the core signs of PTSD plus deep struggles with emotions, self-worth and relationships.
See the “Complex PTSD” guide.
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Some people with PTSD feel detached from their body, or as if the world isn’t real. This is the mind’s way of protecting itself.
See the “Dissociation” guide for grounding skills and support.
Read more
PTSD can follow seeing someone hurt or killed, not only being hurt yourself.
See “Witnessing a traumatic event”.
When and where to get help
Whatever happened, whenever it happened, help can work.
Reach out to a doctor, counselor or therapist if reactions to something that happened are getting in the way of daily life, or haven’t eased after a few weeks. This is true whether the event was last month or decades ago.
Where to start
- Ask a therapist if they are trained in trauma-focused therapy. The “Therapies for trauma” guide explains the main types.
- Talk to your primary care provider. They can refer you to a trauma-informed therapist.
- Veterans can call 988 and press 1, or text 838255, for the Veterans Crisis Line.
📝 Worksheets for this guide
Fill these in privately in the app. Your answers stay on your phone.
Sources
- Kessler et al. (peer-reviewed) (2017). Trauma and PTSD in the WHO World Mental Health Surveys (European Journal of Psychotraumatology)
- U.S. Department of Veterans Affairs, National Center for PTSD. PTSD Basics
- Utzon-Frank et al. (peer-reviewed) (2014). Occurrence of delayed-onset post-traumatic stress disorder: a systematic review and meta-analysis of prospective studies (Scandinavian Journal of Work, Environment & Health)
- McLaughlin et al. (peer-reviewed) (2015). Subthreshold posttraumatic stress disorder in the World Health Organization World Mental Health Surveys (Biological Psychiatry)
- Mota et al. (peer-reviewed) (2016). High burden of subthreshold DSM-5 post-traumatic stress disorder in U.S. military veterans (World Psychiatry)
- Davydow et al. (peer-reviewed) (2008). Posttraumatic stress disorder in general intensive care unit survivors: a systematic review (General Hospital Psychiatry)
- Edmondson et al. (peer-reviewed) (2012). Posttraumatic stress disorder prevalence and risk of recurrence in acute coronary syndrome patients: a meta-analytic review (PLoS One)
- U.S. Department of Veterans Affairs, National Center for PTSD. Effects of Disaster Events: Resilience and Risk Factors
- U.S. Department of Veterans Affairs, National Center for PTSD. Grief: Different Reactions and Timelines in the Aftermath of Loss
- National Institute of Mental Health (NIMH). Post-Traumatic Stress Disorder
- National Institute of Mental Health (NIMH). Help for Mental Illnesses
- Substance Abuse and Mental Health Services Administration (SAMHSA). In Crisis? Find Support
This guide is for education and self-care. It is not a diagnosis or a substitute for professional care. Please talk to a counselor or clinical provider about your health. Reviewed October 2026.

