Posttraumatic stress disorder (PTSD)

PTSD is what it's called when the alarm a terrifying event set off doesn't switch off. Weeks, months, or years later, your sleep, your attention, and your body are still organized around something that already happened. Trauma covers the wider territory, including what never becomes a diagnosis. This page is about the condition with criteria.

Since 2013 the DSM has classified PTSD as a trauma- and stressor-related disorder rather than an anxiety disorder. Much of it is still lived as fear that has lost track of time — vigilance, dread, avoidance, a nervous system answering the present as if it were the past — and many people with PTSD go looking for help under the word anxiety.

What counts as the event

The diagnosis starts with exposure to actual or threatened death, serious injury, or sexual violence. It can have happened to you, in front of you, or to someone close to you — in which case it has to have been violent or accidental. It can also come through repeated exposure at work, the way it does for paramedics, police, and people who investigate child abuse. Seeing it on the news or online doesn't qualify unless that viewing is part of the job.

That bar is narrower than everyday use of the word trauma, and a lot of confusion lives in the gap. A divorce, a firing, years of being belittled can do real damage and produce many of the same symptoms without meeting it. That is a boundary in a classification system, not a ruling on how bad it was.

What it looks like

Four clusters of symptoms, lasting more than a month and causing real distress or getting in the way of your life.

Intrusion. The event comes back uninvited: memories that arrive on their own, nightmares, flashbacks in which some part of you is back there, and strong physical or emotional reactions to reminders.

Avoidance. Effort spent not thinking about it and not feeling it, and staying away from the people, places, conversations, and situations that bring it up. This is the symptom most often mistaken for coping, because in the short term it works.

Changes in thinking and mood. Gaps in memory for parts of what happened. Hard, fixed beliefs — _I can't trust anyone_, _I should have stopped it_, _nowhere is safe_ — and blame aimed at yourself or others in ways the facts don't support. Fear, guilt, shame, or anger that has become the baseline. Losing interest in things, feeling cut off from the people closest to you, and being unable to feel much that's good even when good things happen.

Arousal and reactivity. Irritability or outbursts, reckless or self-destructive behavior, constant scanning for danger, an outsized startle, trouble concentrating, trouble sleeping.

The diagnosis requires a minimum number of symptoms in each cluster, not all of them, so two people with PTSD can look very different from each other.

Timing and variations

Strong reactions in the first month after an event are common, and many fade on their own. When a specific set of symptoms lasts from three days to a month after the event and causes significant distress or impairment, clinicians may diagnose acute stress disorder. PTSD is considered once the symptoms persist past a month.

It doesn't always begin right away. When full criteria aren't met until six months or more after the event, the DSM calls it delayed expression. People often don't connect what they're feeling to something years old. A new loss, a birth, an anniversary, or a stretch of life calm enough to stop holding everything together can be what brings it up.

Some people with PTSD also have persistent or recurring dissociation: feeling detached from their own body, watching themselves from outside, or finding the world unreal or dreamlike. The DSM recognizes this as a dissociative subtype, and it may affect how treatment is paced.

Complex PTSD is a diagnosis in ICD-11, the World Health Organization's system, and not in the DSM. It describes PTSD plus lasting difficulty with emotional regulation, self-worth, and relationships, usually after trauma that was prolonged or repeated and hard or impossible to escape. Many US clinicians use the term even though the DSM doesn't.

Treatment

PTSD is among the most studied conditions in psychotherapy. Clinical guidelines from the VA and Department of Defense, the American Psychological Association, and the UK's NICE converge on trauma-focused psychotherapy — treatment that works directly with the memory of the event and what it has come to mean, rather than around it.

The named approaches:

Cognitive processing therapy (CPT) usually runs about twelve sessions and focuses on the beliefs the event left behind — about blame, safety, trust, power, and worth. You examine those beliefs against what actually happened. The standard current protocol doesn't require writing an account of the event; a version that adds one exists.

EMDR has you hold the memory in mind in short sets while attending to bilateral stimulation, usually side-to-side eye movements or alternating taps. It doesn't require a detailed spoken account of the event.

Prolonged exposure (PE) involves recounting the memory in detail, repeatedly, in session — usually recorded so you can listen between sessions — and gradually returning to situations you've avoided that are objectively safe. The work is learning that the memory can be held and the reminders approached without the outcome the avoidance was built to prevent, and that the distress along the way is survivable. It typically runs eight to fifteen sessions.

Written exposure therapy (WET) is five sessions. Each one is spent writing about the event for half an hour under specific instructions, with little or no homework between sessions.

These approaches ask very different things of you, especially in how much they require you to put the event into words. Asking a therapist which one they use, and why it fits you, is a reasonable first question.

In trials, a substantial share of people who complete one of these treatments no longer meet criteria for PTSD at the end. A meaningful share also stop before finishing, for reasons that vary. Approaching what you've avoided is demanding, and distress can rise for a while, but getting worse is not a required step in getting better. If the work feels unmanageable, say so to the therapist rather than pushing through in silence.

When danger is ongoing — you still live with the person who hurt you, for example — safety planning is part of treatment from the start. Whether and when to begin trauma processing depends on the circumstances; it isn't automatically ruled out.

Medication can help, alone or alongside therapy. Sertraline and paroxetine are the two drugs approved by the FDA for PTSD, and other antidepressants are used as well. VA/DoD guidelines recommend against benzodiazepines for PTSD. Medication decisions belong with a psychiatrist or other prescriber.

What to look for in a therapist

Ask which named protocol they use and where they trained in it. CPT, PE, and EMDR each have formal training followed by consultation on real cases, and a therapist who has completed that can tell you so specifically. For EMDR, the difference between basic training and certification is covered on the EMDR page.

Ask how they track progress. Many clinicians delivering these protocols use a standard symptom questionnaire — the PCL-5 is the common one — at regular intervals, so that you and they can see whether the treatment is working rather than guessing.

Ask what happens if you start to dissociate in session or the work becomes more than you can manage that week. You want a concrete answer about adjusting pace, not a promise that it won't happen.