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Complex PTSD

When the hurt went on for a long time, healing can take time too. What you learned in order to survive can slowly be unlearned, at your pace.

⏱ 7 min read📑 10 sections📚 21 sources✅ Reviewed October 2026

What is complex PTSD?

When trauma was repeated or went on for a long time.

Complex PTSD (sometimes written CPTSD) can develop after trauma that happened over and over, or lasted a long time, often when escaping was impossible or dangerous. Examples include long-term abuse or neglect in childhood, ongoing domestic abuse, trafficking, war, or living with constant violence.

It includes many of the same experiences as PTSD, like flashbacks, avoidance and feeling on guard. But it often goes deeper, affecting how a person handles feelings, sees themselves, and relates to others.

🌊 Big waves of emotionFeelings can rise fast and hard, or shut off completely.
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People with complex trauma may react very strongly to painful feelings, with anger or overwhelming distress that is hard to calm. Others swing the other way and feel numb or disconnected from themselves.

This makes sense: when you grew up or lived for years without safety, you never got the chance to learn how to calm down with someone else’s help. Those skills can still be learned later.

Naming the feeling (“I’m feeling panic” or “I’m shutting down”) is a small first step that can take some of its power away.
🪞 How you see yourselfDeep, lasting feelings of shame, guilt, failure or worthlessness.
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Long-term trauma often leaves people believing something is wrong with them. They may feel ashamed, guilty, or like a failure, even when they have done nothing wrong.

A therapist at Cleveland Clinic explains that childhood trauma often shows up in adulthood as a profound sense of shame and guilt. Those feelings were learned in a harmful place. They are not the truth about who you are.

Shame says “I am bad.” The truth is closer to “Something bad happened to me.”
🤝 RelationshipsTrusting people and staying close can feel very hard, or very scary.
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When the people who hurt you were also the people you depended on, closeness can feel dangerous. People with complex trauma may find it very hard to build and keep close relationships.

Some people keep others at arm’s length. Others hold on tight, fearing they will be left. Both are ways of trying to stay safe.

Safe, steady relationships, including with a therapist, can slowly teach the body that closeness can be safe.
📘 A note on the nameExperts still discuss how to describe complex PTSD. Your experience is real either way.
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Complex PTSD is recognized by the World Health Organization, but not every diagnostic system lists it separately. That debate is about labels. It does not change how real and heavy these experiences are.

Therapy for complex trauma usually starts gently, by building a safe, trusting relationship and coping skills before working with painful memories, always at your pace.

Having some of these experiences doesn’t mean you have complex PTSD. Only a qualified professional can assess what’s going on for you. Please talk to your clinical provider or therapist.

PTSD or complex PTSD?

How the two are alike, how they differ, and why the label matters less than the care.

PTSD and complex PTSD share the same core experiences: memories that push in, avoiding reminders, and feeling constantly on guard. Complex PTSD adds deeper, longer-lasting struggles with emotions, self-worth and relationships.

🔁 What they shareReliving, avoidance and feeling under threat are part of both.
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Cleveland Clinic explains that complex PTSD includes PTSD experiences like flashbacks, avoidance, hypervigilance, and frequent negative thoughts and feelings.

The PTSD guide describes these experiences in more depth, along with sleep problems and how they affect daily life.

➕ What complex PTSD addsBig emotional reactions, deep shame or worthlessness, and great difficulty with relationships.
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Three extra areas

  • Emotions: reacting very strongly to painful feelings, or shutting down
  • Relationships: great difficulty forming and keeping close relationships
  • Sense of self: lasting feelings of shame, guilt, failure or worthlessness
These are not character flaws. They are what long-lasting danger teaches a person, and they can change.
🧒 Childhood trauma and caregiversTrauma in childhood, especially from caregivers, is more strongly linked to complex PTSD.
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A 2019 national study of U.S. adults found that trauma building up over childhood was more strongly linked to complex PTSD than to PTSD. Physical and sexual abuse by caregivers was linked to complex PTSD.

The same study found that people with complex PTSD carried a heavier load of distress and lower wellbeing than people with PTSD. That is a reason to reach out for care, not a reason to lose hope.

📘 Two diagnostic manualsThe WHO’s manual lists complex PTSD. The main U.S. manual does not list it separately.
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Complex PTSD has been part of the World Health Organization’s ICD-11 since 2019. The American Psychiatric Association’s DSM-5, which is widely used in the U.S., does not recognize it as a separate condition.

Because it is newly recognized, Cleveland Clinic notes that a provider might diagnose PTSD instead of complex PTSD. There is no test for it: a provider looks at your experiences, history and what you went through.

What matters most is that your provider understands the whole picture, including how long the trauma went on and how it affects your relationships and sense of self. You can tell them directly.
Please don’t use this to diagnose yourself or someone else. Only a qualified professional can assess what’s going on. Whatever the name, your experiences are real and you deserve care.

Childhood trauma and ACEs

Hard childhood experiences can echo into adulthood, but they are not destiny.

Adverse Childhood Experiences, or ACEs, are potentially traumatic things that happen between birth and age 17. The CDC includes experiencing violence, abuse or neglect, witnessing violence at home or in the community, and losing a family member to suicide.

ACEs also include growing up in a home with substance use problems, mental health problems, parental separation, or a family member in jail or prison. Not having enough food, or being without a stable home, can be ACEs too.

ACEs are very common. In a CDC study of U.S. adults (2011–2020), 63.9% reported at least one ACE, and 17.3% reported four or more. The most common were emotional abuse, parents separating or divorcing, and living with someone who misused substances.

📋 The ten classic ACEsThe original ACE questions cover abuse, neglect, and hard things happening at home.
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Many clinicians use a list of ten experiences. Each one counts as a point, making up an “ACE score”. It is a way of understanding risk, not a label or a grade on your life.

The ten ACEs

  • Emotional abuse: being insulted, humiliated or threatened
  • Physical abuse: being hit, pushed or hurt
  • Sexual abuse
  • Emotional neglect: feeling unsupported or ignored
  • Physical neglect: lacking food, clothing or medical care
  • Seeing violence between adults at home
  • Living with someone who misused alcohol or drugs
  • Living with someone with a mental illness or who attempted suicide
  • Losing a parent through separation, divorce or abandonment
  • Living with someone who went to jail or prison

The list leaves out many hard experiences, like racism and discrimination, bullying, community violence, poverty, or serious illness. These can affect children deeply too.

A score can’t capture your story, your strengths, or the people who helped you. It’s a starting point for understanding, not a prediction.
🫀 How ACEs can affect healthLong-term stress in childhood is linked to physical and mental health problems later.
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When a child lives with ongoing stress, their stress hormones stay switched on. This “toxic stress” can affect how the brain grows, especially the areas for memory, thinking and emotions.

Adults who had many ACEs are more likely to live with anxiety, depression, PTSD, sleep problems, substance use, and long-term health conditions like heart disease. The CDC estimates that preventing ACEs could reduce adult depression by as much as 78% and adult heart disease by 22%.

These are links across large groups of people. They do not decide what happens to any one person.
🛡️ Protective factorsThings that buffer children from harm, like a caring adult, good friends, and a supportive community.
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Protective factors are things that lower the risk of harm, or help children cope when hard things happen. The single most powerful one is safe, stable, nurturing relationships.

What the CDC lists as protective

  • Families with safe, stable and nurturing relationships
  • Positive friendships and peer groups
  • Caring adults outside the family, like mentors, coaches or teachers
  • Families who work through conflict peacefully and help children solve problems
  • Families who have fun, positive times together
  • Communities where people feel connected and violence is not accepted
  • Access to safe housing, childcare, after-school programs, and health and mental health care
You can be that “caring adult” for a young person: a neighbor, aunt, coach or grandparent who listens and shows up.
☀️ Positive childhood experiencesGood experiences matter too, and they can soften the effects of hard ones.
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Researchers have also studied “positive childhood experiences”: things like feeling able to talk to family about feelings, feeling family stood by you in hard times, enjoying community traditions, feeling you belonged at school, and having adults who genuinely cared.

In a 2019 study of adults in Wisconsin, those who had 6–7 of these experiences had 72% lower odds of depression or poor mental health than those who had 0–2, even after taking ACEs into account. The study shows a link, not proof of cause, but the message is hopeful.

Love, belonging and support count. They can grow strength alongside the hurt.
🌅 ACEs are not destinyHealing can happen at any age. Your past shapes you, but it doesn’t have to define you.
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Knowing about ACEs can be eye-opening, and sometimes painful. But risk is not the same as fate. Many people with high ACE scores go on to live full, connected and healthy lives.

Healing is possible, even if it takes time. Good sleep, healthy food, movement, time in nature, mindfulness, supportive people and talk therapy can all help the body and mind recover from long-term stress.

It is never too late to have new, safe, nurturing relationships. They help the brain and body learn something new.
ACEs can be prevented. The CDC says that safe, stable, nurturing relationships and environments for all children help stop ACEs before they start. Communities, schools and families all have a part to play.
If you lived through sexual abuse as a child, the Childhood sexual abuse guide offers gentle, focused support.

Emotional neglect and attachment trauma

Sometimes trauma is about what was missing, not what happened.

Not all trauma comes from something loud or violent. Some comes from what a child needed and didn’t get: comfort, attention, safety, or someone who noticed how they felt. These wounds are harder to see, so people often don’t realize they have them.

🔇 Emotional neglectGrowing up feeling unsupported, unseen or ignored, even if your physical needs were met.
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Emotional neglect is one of the ten ACEs. It means feeling unsupported or ignored as a child. There may have been food on the table and a roof overhead, but no one asked how you were, comforted you when you cried, or noticed when you were struggling.

Because nothing “happened”, people often say “I had a fine childhood” and then wonder why they feel empty or alone. It is the absence of something, so it can be hard to name.

How it can show up later

  • Not knowing what you feel, or feeling numb
  • Finding it hard to ask for help or believe anyone would want to help
  • Feeling like your needs are “too much”
  • Being very independent, but lonely
  • Being harsh on yourself and kind to everyone else
Recognizing emotional neglect isn’t about blaming parents. Many caregivers were struggling or never got this care themselves. It’s about understanding yourself, so you can give yourself what you missed.
🪢 Attachment traumaWhen early bonds with caregivers felt unsafe or unpredictable, it can shape how we love and trust.
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Attachment is the bond a baby forms with the people who care for them. When a caregiver responds reliably, the child learns that the world is safe and people can be trusted. This is called secure attachment.

When care felt unsafe or unpredictable

  • Anxious attachment: often linked to care that was sometimes warm and sometimes not. Later: fear of being left, needing reassurance
  • Avoidant attachment: often linked to little emotional support. Later: strong independence, discomfort with closeness
  • Disorganized attachment: often linked to abuse, trauma or neglect. Later: wanting love but fearing it, pulling close then pushing away

Attachment trauma can also happen later in life, for example after a deep betrayal. And you may feel more secure with some people than with others.

The hopeful part: attachment styles can change. It starts with noticing your patterns, then slowly reshaping them, often with the help of a therapist and safe relationships.

If you notice the same painful pattern in many relationships, that’s not a sign you’re broken. It’s a clue about what you learned, and what you can learn next.

The Attachment, love & intimacy guide explores attachment styles and moving toward security.

These experiences don’t mean something is wrong with you. Only a qualified professional can assess what’s going on for you. Please talk to your clinical provider or therapist.

Family patterns that pass down

How pain can pass through families, and how cycles can be broken.

Intergenerational (or generational) trauma is when the effects of a painful experience that was never healed get passed down to children and grandchildren. Cleveland Clinic calls it “invisible family baggage”: you can’t see it, but you can feel its weight.

It can start with war, violence, abuse, poverty, displacement, addiction, or a family losing everything. The people who carry it today did not cause it. And families pass on good things too: love, traditions, courage and strength.

👀 Learned patternsChildren copy what they see. Shouting, silence or harshness can start to feel “normal”.
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Parents and caregivers are a child’s first teachers. If conflict at home was handled with aggression, or nobody talked about feelings, a child may grow up thinking that is how families work.

These patterns can shape who we choose as partners and how we parent, often without us noticing. That is how cycles keep going.

⛈️ Passed-down fearsSometimes people feel fears about things they never lived through.
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Cleveland Clinic shares an example: a grandfather lost his home to a tornado, his child hid in the basement whenever it rained, and the grandchild now feels anxious every time there is a storm forecast, even though they never saw storm damage themselves.

Fears, rules and “we don’t talk about that” can be handed down without anyone explaining where they came from.

🔗 Breaking the cycleIt starts with noticing, naming, and choosing something different, with support.
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Steps toward a new pattern

  1. Notice the pattern: “In my family, we…”
  2. Name where it may have come from, without blaming yourself
  3. Choose one thing you want to keep, and one you want to change
  4. Find support: trusted people, books, a therapist, or a support group
  5. Practise the new way, and expect to slip sometimes. That’s normal.

Trauma-informed therapy, including CBT, can help people accept their family story, notice its effects, and build healthier habits and thought patterns. Change takes time, because these responses are deeply held.

Being a “cycle breaker” is brave and often lonely. Find others walking the same path. You don’t have to do it alone.
The “Generational trauma: understanding it” guide goes much deeper: what the research says (including early science on genes), cultural trauma, reparenting yourself, boundaries, and family pushback. Try the “Patterns I want to keep or change” worksheet here too.
Your family’s history is part of your story, but it doesn’t have to decide your future.

Therapy for complex PTSD

Talk therapy is the main treatment. It usually starts with safety and goes at your pace.

Cleveland Clinic describes talk therapy (psychotherapy) as the main treatment for complex PTSD. Therapy for complex trauma usually starts gently, by building a safe, trusting relationship and coping skills before working with painful memories.

🤝 Safety and trust firstA steady, trusting relationship with your therapist is the foundation.
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Cleveland Clinic calls building a safe relationship with a therapist “the most important step” before opening up. For people whose trust was broken again and again, this can take time, and that is okay.

Early sessions often focus on

  • Getting to know your therapist and how sessions work
  • Grounding and calming skills you can use anywhere
  • Naming feelings and noticing body signals
  • Setting the pace together, including what not to talk about yet
It is okay to try a few therapists before you find the right fit. Feeling safe with them matters.
🧠 Trauma-focused CBTUnderstanding stress responses, managing symptoms, reworking painful thoughts, and slowly facing what you avoid.
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Cleveland Clinic names trauma-focused cognitive behavioural therapy as a main form of therapy for complex PTSD. It covers how the body responds to stress, managing symptoms, reframing painful thinking, and gradually facing avoided situations.

✍️ Cognitive Processing Therapy (CPT)Changing the stuck, painful beliefs that formed during the trauma.
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CPT focuses on distressing thoughts and feelings that developed after the trauma, like “I’m worthless” or “It was my fault.” You learn to look at them more fairly.

👁️ EMDRProcessing memories while paying attention to a back-and-forth movement or sound.
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In EMDR, you focus on sounds or movements while thinking about the traumatic event, so it becomes less upsetting over time. Cleveland Clinic lists it as a treatment for complex PTSD.

Look for a therapist who is properly trained in EMDR and experienced with complex trauma.
👥 Group and peer supportBeing with others who understand can ease shame and loneliness.
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Talk therapy can happen in groups as well as one-to-one. Peer support, from people with lived experience, is one of the six principles of trauma-informed care.

Hearing someone else describe what you felt for years can be a powerful “I’m not the only one” moment.

🐢 Progress is gradualChange usually comes slowly, with ups and downs. That is normal.
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Cleveland Clinic notes that symptoms usually improve gradually rather than all at once. For many people, complex PTSD is something they learn to manage over time, and therapy helps with that.

A hard week does not erase your progress. Healing from long-lasting trauma often looks like a spiral, not a straight line.
The PTSD guide explains each trauma therapy in more detail, and the Healing from trauma guide covers body-based approaches and what good trauma-informed care looks like. For anything medical, please consult with your clinical provider.

Daily life with complex PTSD, in short

Small skills for big feelings, a harsh inner voice, boundaries and trust. Tap any card.

Long-lasting trauma often teaches survival skills that made sense back then: staying quiet, pleasing others, switching off feelings, or expecting the worst. Day to day, you can slowly practise new skills alongside therapy.

🌊 When feelings flood inNotice whether you are too revved up or too shut down, then use a skill that fits.
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Researchers describe how long-lasting trauma can leave the nervous system easily pushed out of the “window of tolerance”, the calm-enough zone where you can think and cope. Healing aims to widen that window.

A quick check

  1. Name it: “I’m flooding” or “I’m shutting down.”
  2. If too high: slow your breathing, make the out-breath longer, press your feet into the floor.
  3. If too low: move, splash cool water on your face, name five things you can see.
  4. Remind yourself: “That was then. This is now.”
The Trauma: what it is & how it affects you guide has a “My window of tolerance” worksheet to map this out.
🪞 Answering the inner criticShame was learned in a harmful place. It is not the truth about you.
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Lasting feelings of shame, guilt, failure and worthlessness are a core part of complex PTSD. A therapist at Cleveland Clinic explains that childhood trauma often shows up in adulthood as a profound sense of shame and guilt.

Ways to talk back, gently

  • Ask: “Would I say this to a friend who went through what I did?”
  • Notice whose voice it sounds like. It may be an old voice, not yours
  • Swap “I am bad” for “Something bad happened to me”
  • Write down one kind, true thing about yourself each day
Try the “Kinder truths about me” worksheet.
🙅 Small, safe boundariesIf saying no once felt dangerous, practise tiny “no”s in safe places.
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People who grew up with an unpredictable or harmful adult often learned the “fawn” response: keeping the peace by pleasing, agreeing and putting others first. As adults, saying no or knowing what they want can feel very hard.

Starting small

  • Choose where to eat, or what to watch
  • Say “Let me get back to you” instead of an instant yes
  • Leave a conversation that feels unkind
  • Notice how your body feels after a small no. Often the fear passes
Use the “My boundaries” worksheet to plan a few boundaries you’d like to practise.
🤝 Building safe relationshipsCloseness may feel scary at first. Steady, safe people help the body learn that trust can be safe.
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When the people who hurt you were also the people you depended on, closeness can feel dangerous. Some people keep others at arm’s length; others hold on tight, fearing they will be left. Both are ways of trying to stay safe.

Attachment patterns can change. It starts with noticing your patterns, then slowly reshaping them, often with a therapist and safe relationships. The Attachment, love & intimacy guide goes deeper.

Look for people who are consistent: they do what they say, respect your “no”, and stay kind when you disagree.
🌫️ Feeling far awaySwitching off or feeling unreal can be part of complex trauma. Grounding helps.
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Some people with complex trauma swing between big emotions and feeling numb or disconnected from themselves. This shutting down is the mind protecting you when things are too much.

Grounding, like naming what you can see and feeling your feet on the floor, brings you back to now. The Dissociation guide and the Healing from trauma guide have step-by-step grounding skills.

You survived something that went on for a long time. Learning new ways to feel safe takes time too. Be as patient with yourself as you would be with a child learning to walk.

Supporting someone with complex trauma

Steadiness, belief and patience matter more than having the right words.

For someone whose trust was broken again and again, a steady, safe person can make a real difference. You don’t need to be an expert. Believing them, staying calm and letting them lead are some of the most helpful things you can offer.

👂 Believe them, don’t pushLet them share at their own pace. You don’t need the details.
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A 2019 review found that negative reactions when survivors disclosed violence, like blaming them, trying to take control or treating them differently, were linked to worse mental health. Calm belief helps.

Things that help to say

  • “I believe you.”
  • “It wasn’t your fault.”
  • “You don’t have to tell me anything you don’t want to.”
  • “What would help right now?”
🧱 Be steady and predictableDoing what you say you’ll do builds trust slowly.
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People with complex PTSD often find it very hard to build and keep close relationships. Reliability helps: turning up when you say you will, keeping confidences, and staying calm when things get tense.

If you need to cancel or change plans, explain why and offer another time. Small surprises can feel big to someone who grew up with unpredictability.
🚪 Don’t take distance personallyPulling close then pushing away can be a survival pattern, not a judgment of you.
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Early trauma can lead to wanting love but fearing it, pulling close and then pushing away. It is a way of trying to stay safe, learned long ago.

Keep the door open with low-pressure invitations, and let them know you’re still there.

🎛️ Offer choicesHaving a say, even in small things, helps someone feel safe again.
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“Empowerment, voice and choice” is one of the six principles of trauma-informed care. When control was taken away for a long time, being asked what you want can be healing.

Small ways to offer choice

  • “Would you rather talk or just sit together?”
  • “Do you want me to come with you, or wait outside?”
  • “Is it okay if I hug you?”
🔋 Look after yourself tooSupporting someone through long-term healing is a marathon. Rest and support matter for you as well.
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Supporting someone with trauma can be draining. You can’t fix another person, and change may be slow. Keep up your own friendships, interests and rest, and consider support or therapy of your own.

If anyone is being hurt or is in danger, get to a safe place and call 911.
For more on being a safe person after trauma, see “Supporting someone” in the Healing from trauma guide.

By the numbers

How common complex PTSD and childhood adversity are. You are far from alone.

Complex PTSD

3.8%of U.S. adults met criteria for complex PTSD in a 2019 national study, slightly more than the 3.4% who met criteria for PTSD (Cloitre et al.).
7.2%of U.S. adults in the same study met criteria for either PTSD or complex PTSD (Cloitre et al.).
1–8%of people worldwide may be affected by complex PTSD, according to expert estimates (Cleveland Clinic).

Childhood adversity

63.9%of U.S. adults reported at least one Adverse Childhood Experience (CDC, BRFSS 2011–2020).
17.3%of U.S. adults reported four or more ACEs (CDC, BRFSS 2011–2020).
3 in 4U.S. high school students reported one or more ACEs, and 1 in 5 reported four or more (CDC).
19.2% / 15.2%of U.S. women / men reported four or more ACEs (CDC, BRFSS 2011–2020).
32.4%of American Indian or Alaska Native adults reported four or more ACEs, the highest of any group (CDC, BRFSS 2011–2020).

Hope

Up to 78%of adult depression might be prevented by preventing ACEs, the CDC estimates.
72%lower odds of depression or poor mental health in adults who had 6–7 positive childhood experiences, compared with 0–2 (JAMA Pediatrics, 2019).
Behind every number is a person. Hard beginnings are common, and so is healing.

When and where to get help

It is never too late to get support, whenever the hurt happened.

It’s a good idea to reach out to a doctor, counselor or therapist if what happened to you is getting in the way of your relationships, work, sleep or sense of who you are. Many people wait years. Whenever you reach out, it counts.

Reach out if you notice…

  • Feelings that swing very high or shut off completely, and are hard to calm
  • Flashbacks, nightmares or memories that keep pushing in
  • Pulling away from people, or relationships that keep feeling unsafe
  • Strong, lasting shame, guilt or feeling worthless
  • Thoughts of harming yourself
  • Using alcohol, substances or risky behaviour to cope

Where to start

  • Talk to your primary care provider. They can refer you to a trauma-informed therapist.
  • Ask a therapist: “Do you have experience with complex or childhood trauma?” and “Can we go at my pace?”
  • Domestic violence: National Domestic Violence Hotline, 800-799-SAFE (7233), free and 24/7.
  • Sexual abuse or assault, at any age: RAINN National Sexual Assault Hotline, 800-656-HOPE (4673), 24/7.
  • The “Abuse: the basics” guide and the Safety planning & leaving guide have safety planning and more support.
If you’re in crisis, call or text 988 (U.S.), or text HOME to 741741. If a life is in danger, call 911. Outside the U.S., findahelpline.com lists free, confidential helplines in many countries.
What happened to you was not your fault. You deserved safety then, and you deserve care now.

📝 Worksheets for this guide

Fill these in privately in the app. Your answers stay on your phone.

Patterns I want to keep or changeFamilies pass down both strengths and wounds. Use this to notice what you want to carry forward, and what you want to let go.
Kinder truths about meLong-lasting trauma can leave a harsh inner voice. Use this to notice what it says, and practise a kinder, truer answer. Go slowly, and stop whenever you need to.
My boundariesIf saying no once felt dangerous, boundaries can feel scary. Plan a few small ones to practise in safe places, and notice how it goes.
🔒 Fill in privately in the Mentally United Wellness App. Free, no ads, no accounts.

Sources

  1. U.S. Department of Veterans Affairs, National Center for PTSD. Common Reactions After Trauma
  2. U.S. Department of Veterans Affairs, National Center for PTSD. Talk Therapy for PTSD
  3. U.S. Department of Veterans Affairs, National Center for PTSD. Helping a Family Member Who Has PTSD
  4. National Institute of Mental Health (NIMH). Post-Traumatic Stress Disorder (publication)
  5. Centers for Disease Control and Prevention (CDC) (2026). About Adverse Childhood Experiences
  6. Centers for Disease Control and Prevention (CDC) (2024). Risk and Protective Factors (ACEs)
  7. Centers for Disease Control and Prevention (CDC) (2024). Preventing Adverse Childhood Experiences
  8. Centers for Disease Control and Prevention (CDC), Swedo et al. (2023). Prevalence of Adverse Childhood Experiences Among U.S. Adults — BRFSS, 2011–2020 (MMWR)
  9. Centers for Disease Control and Prevention (CDC) (2018). 6 Guiding Principles to a Trauma-Informed Approach (based on SAMHSA)
  10. NHS (UK National Health Service). Complex PTSD
  11. Cleveland Clinic (2023). CPTSD (Complex PTSD)
  12. Cleveland Clinic (2023). Types of Trauma and How To Heal
  13. Cleveland Clinic (2025). Generational Trauma: What It Is and How To Break the Cycle
  14. Cleveland Clinic (2024). What Is the Fight, Flight, Freeze or Fawn Response?
  15. Cleveland Clinic (2025). Understanding Childhood Trauma & Adverse Childhood Experiences (ACEs)
  16. Cleveland Clinic (2023). Attachment Styles
  17. Corrigan, Fisher & Nutt (peer-reviewed) (2011). Autonomic dysregulation and the Window of Tolerance model of the effects of complex emotional trauma (Journal of Psychopharmacology)
  18. Dworkin, Brill & Ullman (peer-reviewed) (2019). Social reactions to disclosure of interpersonal violence and psychopathology: A systematic review and meta-analysis (Clinical Psychology Review)
  19. Bethell et al. (peer-reviewed) (2019). Positive Childhood Experiences and Adult Mental and Relational Health in a Statewide Sample (JAMA Pediatrics)
  20. U.S. Department of Veterans Affairs, National Center for PTSD. How Does PTSD Affect Families?
  21. Cloitre et al. (peer-reviewed) (2019). ICD-11 Posttraumatic Stress Disorder and Complex Posttraumatic Stress Disorder in the United States: A Population-Based Study (Journal of Traumatic Stress, 32(6), 833–842)

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.

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