PTSD, or post-traumatic stress disorder, is a mental health condition that can develop after experiencing or witnessing a traumatic event. It involves persistent symptoms such as flashbacks, nightmares, avoidance, negative changes in mood and thinking, and being constantly on edge, lasting more than a month and interfering with daily life.

PTSD is caused by exposure to traumatic events such as combat, assault, abuse, accidents, disasters, or sudden loss. Whether trauma leads to PTSD depends on the event itself combined with individual factors like prior trauma, biology, mental health history, and the level of support a person has afterward.

PTSD is highly treatable, and many people experience significant or complete relief from symptoms with evidence-based treatment. While some people may always carry echoes of their trauma, effective therapy can reduce symptoms to the point where they no longer control daily life, and full recovery is possible for many.

What are PTSD triggers?

Triggers are reminders that set off PTSD symptoms. They can be sights, sounds, smells, places, people, dates, or even internal sensations connected to the trauma. A trigger can prompt flashbacks, anxiety, or strong physical and emotional reactions, even when there is no actual danger present.

How long does PTSD last?

PTSD varies widely. For some, symptoms ease within months, especially with treatment. For others, particularly those with complex or repeated trauma, it can last years if untreated. Treatment significantly shortens and softens its course, which is why early help matters.

What does a PTSD flashback feel like?

A flashback is a vivid re-experiencing of a traumatic event, in which a person may feel as though it is happening again right now. Flashbacks can involve intense images, emotions, and physical sensations, and during severe ones a person may temporarily lose awareness of their actual surroundings.

What is complex PTSD?

Complex PTSD (C-PTSD) develops after prolonged, repeated trauma such as long-term abuse, captivity, or chronic neglect. In addition to core PTSD symptoms, it involves deeper difficulties with emotional regulation, self-worth, identity, and relationships. It often requires longer, specialized treatment but is treatable.

Can PTSD lead to addiction?

Yes. Many people with PTSD use alcohol or drugs to cope with painful symptoms, a pattern called self-medication that can lead to a substance use disorder. When PTSD and addiction occur together, integrated dual diagnosis treatment that addresses both at once is the most effective approach.

What therapy works best for PTSD?

Trauma-focused psychotherapy is the first-line treatment for PTSD. Cognitive processing therapy (CPT), prolonged exposure therapy (PE), and EMDR all have strong evidence. The best therapy depends on the individual, and a qualified clinician can help match the approach to a person's needs and preferences.

How is PTSD diagnosed?

PTSD is diagnosed by a qualified mental health professional through a clinical interview and evaluation, comparing a person's symptoms against DSM-5 criteria. The process considers the trauma, symptoms, their duration and impact, and rules out other conditions, sometimes using standardized trauma screening tools.

Post-Traumatic Stress Disorder: Symptoms, Causes & Evidence-Based Treatment

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What Is PTSD?

PTSD is a mental health condition that can develop after a traumatic event, marked by intrusive memories, avoidance, mood changes, and hyperarousal lasting more than a month. It is highly treatable with trauma-focused therapy.

What Is PTSD?

Post-traumatic stress disorder is a DSM-5 diagnosis that may develop after experiencing or witnessing a traumatic event — combat, assault, abuse, accidents, medical trauma, or sudden loss. Symptoms persist beyond one month and meaningfully disrupt daily life. PTSD is not a sign of weakness; it is the nervous system’s protective response getting stuck in survival mode.

Core DSM-5 Criteria

Exposure to actual or threatened trauma
Intrusion symptoms (memories, flashbacks)
Persistent avoidance of trauma reminders
Negative changes in mood and cognition
Marked changes in arousal and reactivity
Duration over one month with functional impairment

Intrusion

Unwanted memories, flashbacks, nightmares, and intense distress when reminded of the trauma.

Avoidance

Avoiding people, places, thoughts, or feelings that recall the trauma — often shrinking daily life over time.

Mood & Thinking

Negative beliefs about self or others, persistent fear or shame, emotional numbness, and loss of interest.

Hyperarousal

Hypervigilance, exaggerated startle, irritability, sleep disturbance, and difficulty concentrating.

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What Causes PTSD?

Any event that overwhelms the body’s capacity to feel safe can lead to PTSD. Risk depends on the trauma’s severity, duration, support afterward, and prior history.

Combat & War

Sexual or Physical Abuse

Serious Accidents

Medical Trauma

Natural Disasters

First Responder Trauma

Sudden Loss

Childhood Trauma

PTSD vs Acute Stress Disorder

Feature	Acute Stress Disorder	PTSD
Onset	3 days to 1 month after trauma	Symptoms last over 1 month
Duration	Short-term	Chronic if untreated
Symptoms	Dissociation, intrusion, avoidance	Full PTSD criteria across 4 clusters
Treatment	Brief trauma-focused therapy	CPT, PE, EMDR, medication

Complex PTSD (C-PTSD)

Complex PTSD develops from prolonged, repeated trauma — childhood abuse, domestic violence, captivity, or chronic neglect. It includes the core PTSD symptoms plus deeper difficulties with self-concept, emotion regulation, and relationships. Treatment is typically phased: first stabilization, then trauma processing, then reintegration.

Common Signs of C-PTSD

Intense difficulty regulating emotion
Persistent shame, guilt, or worthlessness
Trouble trusting or staying close to others
Dissociation or feeling unreal
Chronic hopelessness

How PTSD Is Diagnosed

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Evidence-Based PTSD Treatments

Structured 12-session therapy that helps reshape unhelpful trauma-related beliefs about safety, trust, and self-worth.

Gradual, therapist-guided engagement with trauma memories and avoided situations to reduce fear and reclaim daily life.

Eye Movement Desensitization and Reprocessing uses bilateral stimulation to help the brain reprocess traumatic memories.

First-line treatment for children and adolescents, with caregiver involvement and trauma narrative work.

Effective for survivors of multiple or prolonged traumas, including refugees and survivors of war.

Builds psychological flexibility and values-based action alongside trauma processing.

Body-based approaches that address the physiological imprint of trauma in the nervous system.

Peer support, reduced isolation, and family-systems healing alongside individual care.

Remote delivery of CPT, PE, and EMDR with outcomes comparable to in-person treatment for many patients.

SSRIs

Sertraline and paroxetine are FDA-approved first-line medications for PTSD.

SNRIs

Venlafaxine is supported as a first-line option for adults with PTSD.

Sleep & Nightmares

Prazosin may reduce trauma-related nightmares and improve sleep.

Medication decisions should be made with a licensed prescriber based on a full clinical assessment.

PTSD and Substance Abuse

Many people with PTSD use alcohol or drugs to mute trauma symptoms — sleep problems, hypervigilance, intrusive memories. Over time, substances worsen PTSD, disrupt sleep further, and increase depression and suicide risk. Treating both conditions together produces the best outcomes.

Dual Diagnosis Treatment

Integrated care addresses trauma and substance use simultaneously instead of in isolation.

Learn About Dual Diagnosis

PTSD in Specific Populations

Veterans

Active Military

First Responders

Healthcare Workers

Survivors of Abuse

Women

Men

Teens & Children

Recovery & Long-Term Healing

Healing from trauma is non-linear, but most people improve significantly with consistent care.
These pillars support long-term recovery alongside trauma therapy.

Sleep Hygiene

Regular Exercise

Mindfulness

Support Networks

Healthy Coping Skills

Trauma Therapy

When to Seek Help — Crisis Resources
If you are having thoughts of self-harm or suicide, call or text 988 (Suicide & Crisis Lifeline). Veterans can press 1 for the Veterans Crisis Line. In an emergency, call 911.

Finding PTSD Treatment

Outpatient Therapy

IOP

PHP

Residential Treatment

Virtual IOP

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Frequently Asked Questions

Common questions about co-occurring disorders and integrated treatment.

PTSD (post-traumatic stress disorder) is a mental health condition that can develop after experiencing or witnessing a traumatic event. It involves intrusive memories, avoidance, mood changes, and hyperarousal that persist for more than a month.

PTSD can develop after combat, abuse, assault, accidents, medical trauma, natural disasters, sudden loss, or repeated exposure to traumatic events as a first responder or healthcare worker.

Some people recover without formal treatment, but many develop chronic symptoms. Evidence-based trauma therapy substantially shortens symptoms and reduces long-term impact.

Triggers are sensory or emotional cues — sounds, smells, places, dates, or feelings — that resemble the original trauma and reactivate the body’s stress response.

Cognitive Processing Therapy (CPT), Prolonged Exposure (PE), and EMDR have the strongest evidence. Trauma-focused CBT is the first-line treatment for children and adolescents.

Yes. Many people self-medicate trauma symptoms with alcohol or drugs, which worsens PTSD over time. Integrated dual-diagnosis treatment addresses both.

A licensed clinician conducts a structured interview, reviews DSM-5 criteria, screens for trauma and co-occurring conditions, and rules out other causes.

SSRIs (sertraline, paroxetine) and the SNRI venlafaxine are first-line. Prazosin is used for trauma nightmares. Medication decisions belong with a licensed prescriber.

C-PTSD develops from prolonged, repeated trauma — such as childhood abuse or captivity. It includes core PTSD symptoms plus difficulties with emotion regulation, self-concept, and relationships.

Many evidence-based protocols last 8–16 sessions, though complex trauma often benefits from phased, longer-term care.

Yes. Children may show withdrawal, regression, sleep problems, or re-enactment in play. Trauma-focused CBT is the gold standard for kids and teens.

PTSD can qualify as a disability when symptoms significantly impair functioning. Veterans may receive VA disability ratings based on severity.

Acute stress disorder lasts 3 days to 1 month after trauma. PTSD is diagnosed when symptoms continue beyond one month.

If trauma symptoms last more than a month, interfere with daily life, or include thoughts of self-harm, contact a clinician or call/text 988.

Call or text 988 (Suicide & Crisis Lifeline). Veterans can press 1 for the Veterans Crisis Line. For immediate danger, call 911.

Related Resources

Reviewed Using Guidance From

NIMH SAMHSA VA / National Center for PTSD American Psychiatric Association ISTSS
This content is for educational purposes only and does not replace professional medical advice. If you are in crisis, call or text 988.

PTSD Is Treatable. Confidential Help Is Available.

Evidence-based trauma care can substantially reduce symptoms and restore daily life.
Speak with a behavioral health specialist today — your call is confidential.

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Post-Traumatic Stress Disorder: Symptoms, Causes & Evidence-Based Treatment

What Is PTSD?

What Is PTSD?

Core DSM-5 Criteria

PTSD Symptoms

Intrusion

Avoidance

Mood & Thinking

Hyperarousal

What Causes PTSD?

Combat & War

Sexual or Physical Abuse

Serious Accidents

Medical Trauma

Natural Disasters

First Responder Trauma

Sudden Loss

Childhood Trauma

PTSD vs Acute Stress Disorder

Complex PTSD (C-PTSD)

Common Signs of C-PTSD

How PTSD Is Diagnosed

(888) 510-3898

Evidence-Based PTSD Treatments

SSRIs

SNRIs

Sleep & Nightmares

PTSD and Substance Abuse

Dual Diagnosis Treatment

PTSD in Specific Populations

Recovery & Long-Term Healing

Finding PTSD Treatment

Frequently Asked Questions

Related Resources

Reviewed Using Guidance From

PTSD Is Treatable. Confidential Help Is Available.

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