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Post-traumatic stress disorder (PTSD)Why do some traumatic events stay present in the mind and body, and can you recover from them?

Reviewed by: Dr. Mahmoud El-Sawy Last updated: September 28, 2026 12 min read
The short answer

Post-traumatic stress disorder is a mental health condition that can develop after experiencing or witnessing a traumatic event, such as a serious accident, violence, war or a sudden loss. The person relives the event again and again as intrusive memories and nightmares, avoids everything that reminds them of it, and the body stays in a state of constant alert. It is a common condition that is treatable with proven psychological therapies, and it is not a sign of weakness of character.

  • Most people who go through trauma improve on their own within weeks; the disorder is diagnosed when symptoms persist and disrupt life.
  • The World Health Organization estimates that about 3.9% of the world's population experiences it at some point in life.
  • Trauma-focused psychological therapy is the first choice, and medication helps some patients.

What is post-traumatic stress disorder?

Post-traumatic stress disorder (PTSD) is a psychological condition that arises after exposure to an event that is life-threatening or extremely terrifying, or after witnessing such an event happen to someone else. The mind remains “stuck” at the moment of danger, recalling it against the person's will, and the body treats the safe present as if it were still in the middle of the event.

It is entirely normal to feel fear, sadness, tension and trouble sleeping in the days and weeks after a traumatic event. This is an expected human response, and in most people it gradually settles. But when the response lasts more than a month, grows stronger instead of fading, and begins to disrupt work, relationships and sleep, doctors speak of post-traumatic stress disorder.

In the International Classification of Diseases (ICD-11) the disorder has the code 6B40 and falls within the group of “disorders specifically associated with stress,” alongside another condition, “complex post-traumatic stress disorder” (6B41). The American DSM-5 places it among “trauma- and stressor-related disorders.” In both, the diagnosis requires a traumatic event that came before the symptoms.

What counts as a traumatic event?

Not every painful situation is “trauma” in the medical sense. What is meant here is an event involving a real threat to life or safety or a risk of serious injury, whether it happened to the person themselves, they witnessed it, or they learned that it violently or suddenly happened to someone close to them. Examples include:

Accidents

Serious road accidents, fires, workplace accidents, falls and severe injuries.

Violence and assault

Physical or sexual assault, armed robbery, domestic violence and severe, repeated bullying.

War and conflict

Living in conflict zones, displacement and seeking refuge, detention, and military service.

Sudden loss

The sudden or violent death of a loved one, or witnessing a death or serious injury.

Disasters

Earthquakes, floods, building collapses and severe epidemics.

Medical events

A stay in intensive care, a difficult childbirth, and a diagnosis of a life-threatening illness.

Emergency doctors, paramedics, firefighters and journalists in conflict zones are also exposed to this kind of event through their work, because they repeatedly face difficult scenes. The details of why some people are affected and others are not are on the causes page.

How common is post-traumatic stress disorder?

70%of people experience a potentially traumatic event in their lifetime
5٫6%of those exposed to trauma develop the disorder
3٫9%of the world's population experiences it at some point
15٫3%among those exposed to war and conflict

These figures come from the World Health Organization and carry two important messages: first, trauma is a very common human experience, and second, most people who go through it do not develop the disorder. The organization also notes that about 40% of people with the disorder recover within a year without intervention, while in others it continues for years if untreated.

Women are affected more than men; in the United States, for example, statistics estimate lifetime prevalence at about 8% of women versus 4% of men, partly related to the different kinds of trauma each is exposed to. We have no reliable published Egyptian figures to rely on here.

What does it feel like from the inside?

Many people with the disorder describe their life after the trauma as having “split into a before and an after.” They may smell a scent or hear an ordinary sound and find their heart pounding and their body stiffening as if the danger were returning. They may stay away from certain roads, places or conversations without explaining why, and feel distant from loved ones, as if there were glass between them.

“I knew I was safe, but my body didn't believe it.” (A phrase repeated by many people who have been through the experience, not a quotation from a specific patient.)

This contradiction between what the mind knows and what the body feels is the core of the disorder. That is why phrases like “forget it” or “be strong” do not help; what is happening is tied to how memory is stored and how the brain's alarm system responds, not to willpower.

What happens in the brain after trauma?

During danger the amygdala (the alarm center) activates and releases stress hormones that prepare the body to flee or fight. After the danger has passed, this response should settle, and the event should be stored in memory as “the past, which is over.”

In post-traumatic stress disorder the alarm system stays highly sensitive, the regulating regions at the front of the brain become less able to calm it, and the memory is not filed in a clear time order. So it returns as vivid sensory fragments: images, sounds and bodily sensations, rather than as a story from the past. The reassuring news is that the brain is flexible, and trauma-focused psychological therapy helps reprocess the memory until it loses its charge.

Acute reaction, post-traumatic stress disorder or complex trauma?

There is no separate page for the types, so here we summarize the main differences doctors use:

The difference between the various responses to trauma
The situationTimingWhat sets it apart
Acute stress reactionHours to days after the eventAn expected, normal response; ICD-11 considers it a passing state rather than a mental disorder, and it usually settles quickly
Acute stress disorder (DSM-5)3 days to one month after the eventSevere symptoms resembling those of post-traumatic stress but within the first month
Post-traumatic stress disorder (PTSD)Lasts at least several weeks (more than one month according to DSM-5)Reliving the event, avoidance, and a constant sense of threat with clear disruption of life
Complex post-traumatic stress disorderUsually after prolonged or repeated trauma that is hard to escapePost-traumatic symptoms plus difficulty regulating emotions, a negative self-image, and ongoing problems in relationships
Adjustment disorderWithin weeks of a life stressorA reaction to non-life-threatening stress such as divorce or job loss, without intrusive memories

Psychiatry also recognizes that symptoms can be delayed, appearing months or even years after the event, sometimes when facing new stress or an occasion that recalls the trauma.

How does it differ from anxiety, depression and normal grief?

  • Generalized anxiety: anxiety that moves between different subjects in life, whereas post-traumatic fear is tied to a specific event and its reminders. See generalized anxiety disorder.
  • Panic attacks: they come suddenly and may have no clear trigger, whereas here they are often set off by a reminder of the event. See panic attacks.
  • Depression: it shares loss of pleasure and withdrawal with the disorder, and the two often occur together, but depression does not necessarily include intrusive memories or heightened alertness. See depression.
  • Grief for a loved one: normal grief centers on longing for the person, but when the death is violent or sudden, images of the moment of death itself may take hold, and this needs assessment.

Common myths and the facts

Myth or fact?
The mythThe truth
Only soldiers get itIt can affect anyone who has been through an accident, violence, loss or disaster, including children.
People who get it have a weak characterIt is linked to the severity of the event, the support afterward and biological factors, not to strength of faith or manliness.
Time will heal itMany people do improve, but the disorder can last for years, and treatment greatly shortens the suffering.
Talking about the trauma makes it worseForced or premature talking can exhaust a person, but structured treatment with a specialist clearly reduces symptoms.
Symptoms must appear immediatelyOnset can be delayed by months or years after the event.
Infographic of myths and facts about post-traumatic stress disorder: only soldiers get it, people who get it have a weak character, time will heal it, talking about the trauma makes it worse, symptoms must appear immediately
The best-known myths about post-traumatic stress disorder and the scientific reality

When should you see a psychiatrist?

  • More than a month has passed since the event and the symptoms have not eased or have grown.
  • Sleep is disturbed most nights by nightmares or heightened alertness.
  • You have started to avoid work, study, going out, or important people in your life.
  • You turn to alcohol, sedatives or any substance to forget or to sleep.
  • You feel anger or emotional numbness that harms your relationships.
  • Thoughts of death or self-harm have appeared, and here help is urgent.

A psychiatrist or a therapist trained in trauma assesses the condition and distinguishes between a normal reaction, the disorder, and any accompanying depression or addiction. You are not asked to tell all the details of the event in the first session; you set the pace.

Can you recover from post-traumatic stress disorder?

Yes, and recovery is the rule, not the exception. The World Health Organization states that trauma-focused psychological therapies, such as trauma-focused cognitive behavioral therapy and eye movement desensitization and reprocessing (EMDR), are the proven first choice. Many people improve even many years after the event; it is never too late to ask for help.

How can the family support a person who has been through trauma?

  • Provide safety and calm first, and keep a simple daily routine that restores a sense of control.
  • Listen if they want to talk, do not pressure them to tell details, and do not question them about what happened.
  • Avoid blame such as “why did you go there?” and minimizing such as “be thankful it wasn't worse.”
  • Notice changes in sleep, mood and substance use without suffocating monitoring.
  • Gently encourage them to seek specialist help, and offer to go with them to the first appointment.
  • Look after yourself too; supporting a traumatized person is exhausting, and the family has every right to ask for support.

Post-traumatic stress disorder guide: everything you need to know

We have gathered everything about post-traumatic stress disorder into 5 pages, each answering one question in detail. Choose what you are looking for:

Suicidal thoughts or danger to self? Get help now

  • Talking about wanting to die, or that life is no longer worth living, or that others would be better off without them
  • Severe despair and a feeling that the pain will never end, or overwhelming guilt and shame tied to the event
  • Saying goodbye to family and friends, or suddenly giving away treasured belongings
  • Severe detachment from reality, or reliving the memory as if it is happening now, with agitation that does not settle
  • A sudden increase in drinking alcohol or using sedatives or drugs, or dangerous impulsiveness and recklessness

Stay with the person and do not leave them alone, listen calmly without judgment or argument, and ask them directly about their thoughts; asking does not plant the idea. Call ambulance (123) or go to the nearest emergency department, or call the mental health support line 16328, and keep medication and objects that could harm them out of reach until help arrives.

Ambulance 123 Mental health support line 16328
Frequently asked questions

Frequently asked questions about post-traumatic stress disorder

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Is post-traumatic stress disorder a real mental illness?

Yes. It is a mental disorder recognized in the ICD-11 and the American DSM-5, with clear diagnostic criteria and proven treatments, so there is no room to dismiss it as “being dramatic” or weak.

What is the difference between psychological trauma and post-traumatic stress disorder?

Trauma is the event and the temporary effect it leaves, and it is very common. The disorder is a condition in which symptoms last many weeks and disrupt life, and it affects only a proportion of those exposed to trauma.

Can a person develop the disorder without experiencing the event themselves?

Yes, it can happen after witnessing a violent event happen to someone else, after learning that someone close suffered a sudden death or violent harm, or through repeated exposure to traumatic details because of one's work.

How long after the event can the disorder be diagnosed?

Diagnosis usually requires symptoms to last more than a month according to DSM-5, or at least several weeks according to ICD-11. Before that, they are generally seen as an acute reaction that may settle on its own with follow-up.

Does post-traumatic stress disorder come back after recovery?

Some symptoms may flare up temporarily with new stress or an anniversary of the event, and this does not mean failure. The skills learned in treatment and early follow-up make these episodes shorter and milder.

Is complex trauma more serious than ordinary post-traumatic stress disorder?

It is more wide-ranging because it affects emotion regulation, self-image and relationships alongside trauma symptoms, and it may need longer treatment in stages, but it too can improve.

Can a young child develop post-traumatic stress disorder?

Yes, even children under six, but their symptoms differ from adults' and may show up in play, behavior and excessive clinging. They need assessment by a child mental health specialist with the parents' involvement.

Does faith affect recovery from trauma?

Faith and spiritual support are a source of comfort and strength for many and can support recovery, but they do not replace treatment when the disorder is present, and having the disorder does not mean weak faith.

Can I ask for help in secret?

Yes, psychiatric consultation is completely confidential, and you can also call the mental health support line 16328 around the clock to talk with a specialist.

Medical reviewDr. Mahmoud El-Sawy, Consultant Psychiatrist and Addiction Specialist

This page was written by the Eradah editorial team and reviewed by a specialist physician under the medical review policy. Last medically reviewed: September 28, 2026. The content is for education and does not replace consulting a doctor.

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