PTSD
PTSD is a mind stuck on alert after the danger has passed, and it is treatable.
By Greg Goodwin · Published November 4, 2026
Cheat Sheet
- Lifetime: about 6 in 100 US adults (6%) will have PTSD at some point in their lives, per the National Center for PTSD.
- Any given year: about 5% of US adults have PTSD in a year; in 2020, about 13 million Americans did.
- Sex difference: about 8% of women and 4% of men will have PTSD at some point in their lives.
- Diagnosis rule: a diagnosis requires symptoms in all 4 groups, lasting longer than a month, and only a mental health provider can diagnose it.
- Timing: symptoms usually start soon after the event but may not appear until months or years later, and can come and go.
- Odds: most people who go through a traumatic event do not develop PTSD.
The 60-Second Version
Posttraumatic stress disorder, or PTSD, is a mental health condition that can develop after a person goes through or sees a life-threatening event. Having stress reactions afterward is normal, and most people start to feel better after a few weeks. When upsetting memories, avoidance, negative changes in mood and thinking, and feeling constantly on edge last longer than a month and disrupt daily life, it may be PTSD. Anyone can develop it at any age, and most people who experience trauma do not. Only a mental health provider can diagnose it. The encouraging news is that effective treatments exist, including talk therapies and sometimes medication, and for many people treatment can ease or even end symptoms. This page is general information, not medical advice or a screening tool, and anyone worried about themselves or someone else should reach out to a health professional.
The Long Version
What Counts as Trauma
The National Center for PTSD explains that not every stressful event is the kind of trauma that can lead to PTSD. To put someone at risk, the event must be shocking and dangerous, something they see or that happens to them, during which they believe their own or others' lives are in danger. Most people will go through at least one such event in their lifetime, and a reaction is typical. Some factors raise the chance of developing PTSD: very intense or long-lasting trauma, direct exposure or injury, sexual assault, and for veterans combat. What happens afterward matters too, since social support can make PTSD less likely while stress can make it more likely.
The Four Symptom Groups
To be diagnosed, a person needs symptoms from each of four groups, though everyone experiences them in their own way. Reliving the event includes nightmares, flashbacks, and strong reactions to reminders. Avoidance means steering clear of people, places, or conversations connected to the event. Negative changes in thoughts and feelings can include numbness, lost interest in usual activities, guilt or shame, and feeling that the world is dangerous. Feeling on edge, or hyperarousal, shows up as trouble sleeping, difficulty concentrating, being easily startled, or sudden irritability. Symptoms usually start soon after the event but may not appear for months or years, and they can come and go.
How Common It Is
The National Center for PTSD says nobody knows the exact number, because no single study asks everyone and because people may not have been diagnosed. Its best estimates are that about 6% of the US population will have PTSD at some point in life, and about 5% of adults have it in any given year, which amounted to about 13 million Americans in 2020. Women are more likely to develop it than men, about 8% versus 4% over a lifetime, partly because of the kinds of traumatic events women are more likely to experience, such as sexual assault. Veterans are more likely to have PTSD than civilians. Most people who experience trauma never develop it.
Children and Teens
Children can show PTSD differently from adults, and the pattern shifts with age. According to the National Center for PTSD, children under 6 may get upset if parents are not close by, have trouble sleeping, or act out the trauma in play. Children ages 7 to 11 may also act out the trauma through play, drawings, or stories, and some have nightmares, become more irritable or aggressive, or want to avoid school. Teens ages 12 to 18 have symptoms more like adults, such as depression, anxiety, withdrawal, or reckless behavior. As children grow older, their symptoms increasingly resemble those of adults, which can make recognition easier for parents and teachers.
Getting Help
Both pages from the National Center for PTSD stress that help works. It lists three trauma-focused psychotherapies as the most effective: cognitive processing therapy, prolonged exposure, and eye movement desensitization and reprocessing. Certain medications can also help, and some people combine therapy and medication. "Getting better" means different things to different people; for many, treatment can get rid of symptoms altogether, and others have fewer or less intense symptoms. A doctor or mental health provider is the right first stop if symptoms last longer than a month, are very upsetting, or disrupt daily life. In the US, the Veterans Crisis Line is reachable by calling 988 and pressing 1.
Why People Care
PTSD affects millions of people, and misunderstandings about it can keep people from seeking care. Knowing that it is a recognized condition, that most trauma survivors do not develop it, and that treatments exist helps friends, families, and workplaces respond with compassion. This is general information, not medical advice.
Glossary
- Trauma
- A shocking and dangerous event that you see or that happens to you, during which you think your life or others' lives are in danger.
- Re-experiencing
- Symptoms in which memories of the event return, such as nightmares or flashbacks.
- Trigger
- A sight, sound, or smell that reminds someone of the event and can cause them to relive it.
- Hyperarousal
- Feeling on edge or keyed up, with symptoms such as trouble sleeping, trouble concentrating, or being easily startled.
- Trauma-focused psychotherapy
- Talk therapy that focuses on the memory of the traumatic event or its meaning, such as cognitive processing therapy.
Go Deeper
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