Why EMDR Might Look Different for PTSD and Complex PTSD

By: Melissa Chana, MA, LPCC

Why trauma history can change the pace, preparation, and shape of EMDR therapy

People sometimes come into my office having done their homework.

They've listened to the podcasts. They've watched videos about EMDR. They know there are eye movements involved. And occasionally they've heard a story that sounds something like:

"I did EMDR for three sessions and my trauma was basically gone."

Then they look at me like:

Great. Where do I sign?

I genuinely love the hope behind that.

But there's something important that often gets lost when we talk about EMDR: EMDR may look quite different depending on the person, their history, their current stability, and the kind of trauma we're treating.

Someone dealing with PTSD connected to one or several identifiable traumatic events may have a very different course of EMDR than someone whose trauma developed repeatedly over childhood, relationships, attachment experiences, neglect, abuse, instability, or years of living in survival mode.

In other words, there's a difference between:

"Something terrible happened to me."

and

"My brain and nervous system developed while terrible, frightening, confusing, neglectful, or emotionally unsafe things kept happening."

That's an oversimplification, of course. PTSD can result from repeated trauma, and complex trauma histories vary enormously. But it helps explain why two people can both walk into an EMDR therapist's office and have treatments that look surprisingly different.

PTSD and Complex PTSD Aren't Exactly the Same Thing

PTSD can involve symptoms such as intrusive memories, nightmares, avoidance, hyperarousal, negative changes in mood and thinking, and feeling as though the traumatic experience is still threatening you in the present.

Complex PTSD, or C-PTSD, is recognized as a separate diagnosis in the ICD-11. In addition to the core symptoms of PTSD, it includes disturbances in self-organization involving emotional regulation, a persistently negative sense of self, and difficulties in relationships (World Health Organization, 2024).

One important technical note: C-PTSD is not currently a separate diagnosis in the DSM-5-TR, which is commonly used for diagnosis in the United States (American Psychiatric Association, 2022).

But regardless of the diagnostic label, clinicians regularly work with people whose trauma wasn't one isolated experience.

Their trauma was repeated.

Relational.

Developmental.

Sometimes it happened inside the very relationships that were supposed to provide safety.

And that can change what trauma treatment needs to look like.

EMDR for PTSD May Have a Clearer Starting Point

Imagine someone who had a relatively stable developmental history and then experienced a serious car accident at age 32.

Before the accident, they drove comfortably.

Afterward, they panic on highways.

There's a fairly obvious dividing line:

Before the accident. After the accident.

In EMDR, we may identify the accident as a target memory and assess the disturbing image, emotions, physical sensations, negative belief, and level of distress associated with it.

Maybe the belief is:

"I'm not safe."

Then reprocessing begins.

As the memory is processed, the person still remembers what happened. EMDR isn't designed to erase memories.

But the memory may begin to feel different.

Instead of:

"I'm back there. I'm in danger."

it becomes:

"That happened. It was terrifying. I survived. I'm safe now."

We may then work with current triggers and future situations, such as driving on the highway again.

Not every PTSD case moves quickly or neatly, of course. Trauma treatment rarely cooperates with our desire for tidy timelines.

But when there are identifiable traumatic events and substantial stability elsewhere in a person's life, the EMDR treatment map may sometimes be relatively straightforward.

Complex trauma can give us a very different map.

C-PTSD Doesn't Always Come With One "Worst Memory"

Ask someone with lifelong trauma:

"What's the traumatic event?"

and sometimes you'll get:

"Which one?"

Other times you'll hear:

"Honestly, I don't think anything that bad happened."

Then twenty minutes later they're casually describing a childhood experience that makes my therapist brain quietly reach for an imaginary red flag.

Complex trauma doesn't necessarily organize itself around one catastrophic memory.

Sometimes the trauma was the environment.

Maybe a parent was unpredictable.

Maybe love depended on being useful, successful, quiet, agreeable, attractive, responsible, or easy.

Maybe there was abuse, addiction, violence, chronic criticism, neglect, parentification, bullying, repeated abandonment, medical trauma, loss, or caregivers who could be loving one day and frightening the next.

Sometimes nobody ever hit the child.

But nobody reliably protected, comforted, noticed, or emotionally understood them either.

The nervous system learns from those experiences too.

Instead of learning:

"That event was dangerous,"

a child may learn:

I'm not safe.

My needs are too much.

People leave.

I have to keep everyone happy.

I can't trust anyone.

I'm responsible for other people's emotions.

If I stop paying attention, something bad will happen.

Love has to be earned.

Now we're not simply working with a traumatic memory.

We're working with an entire network of experiences that helped shape identity, attachment, relationships, behavior, and expectations of the world.

That can change how we use EMDR.

The Eight Phases Don't Always Mean Eight Neat Steps

EMDR uses an eight-phase treatment model that includes history taking, preparation, assessment, desensitization, installation, body scan, closure, and reevaluation (Shapiro, 2018).

On paper, this can look wonderfully organized.

Phase 1.

Phase 2.

Phase 3.

Trauma processed.

Congratulations. Please collect your emotionally regulated nervous system on the way out.

Unfortunately, human beings did not read the manual.

With a relatively circumscribed trauma, the preparation phases may sometimes move fairly quickly.

With complex trauma, we may spend considerably more time making sure someone can remain present and connected while approaching painful material.

And we may return to preparation repeatedly.

That's important.

Preparation isn't what we're doing because we haven't started the "real" EMDR yet.

For some complex trauma clients, preparation is an essential part of trauma treatment.

EMDR for C-PTSD May Require More Preparation

Before asking someone's nervous system to revisit experiences it has spent decades avoiding, suppressing, compartmentalizing, or dissociating from, we may need to build capacity.

That might involve learning to:

• recognize activation before becoming completely overwhelmed

• notice emotions and physical sensations without immediately escaping them

• distinguish past danger from present safety

• recognize dissociation or shutdown

• develop grounding and regulation strategies

• move in and out of difficult emotional material without becoming flooded

• experience some sense of internal safety

• ask for help

• tolerate vulnerability

• identify triggers and patterns

• establish enough safety outside therapy to support the work happening inside therapy

This doesn't mean every person with complex trauma needs months or years of stabilization before doing EMDR.

There isn't one universal timeline.

Some people move into reprocessing relatively quickly. Others need considerably more preparation.

And sometimes treatment looks like:

prepare → process → stabilize → process → discover another layer → work with that → grieve → process again.

Healing can be annoyingly nonlinear.

Apparently nobody informed the nervous system that we prefer checklists.

Parts Work May Become Part of EMDR

Complex trauma also frequently involves internal conflict.

One part of you desperately wants connection.

Another trusts absolutely no one.

One part wants to process the trauma.

Another part suddenly makes your brain go blank the moment we get near it.

There's the caretaker.

The perfectionist.

The overachiever.

The angry protector.

The hyper-independent part.

The part that says:

"I'm fine."

And underneath all of that, there may be a much younger part who learned that keeping everyone else okay was the safest way to survive.

This doesn't automatically mean someone has a dissociative disorder.

"Parts" can simply be a useful way of understanding conflicting emotional states, beliefs, needs, and protective strategies.

Parts-oriented approaches can be integrated with EMDR when appropriate, particularly when protective responses interfere with accessing or tolerating traumatic material.

Because sometimes one part of a client genuinely wants healing while another part is essentially standing at the door saying:

Absolutely not. I've kept this operation running for 37 years and neither of you appears qualified to take over.

Fair.

Instead of bulldozing that protector, we get curious about it.

What is it afraid would happen if it stopped doing its job?

What did it protect you from?

What does it need before allowing us closer to the memory?

For someone whose autonomy or boundaries were repeatedly violated, forcing our way past internal resistance would be a pretty ironic way to conduct trauma therapy.

Complex Trauma Often Includes Grief Work

This is one of the pieces of complex trauma treatment I wish people talked about more.

Healing isn't only about becoming less afraid of what happened.

Sometimes it's about finally recognizing what should have happened and didn't.

That's grief.

Grieving the childhood you should have had.

The parent you needed.

The apology that may never come.

The years spent thinking you were the problem.

The relationships you accepted because dysfunction felt strangely familiar.

The version of yourself who became fiercely independent because needing someone felt dangerous.

Sometimes trauma processing brings tremendous relief.

Sometimes it brings the devastating realization:

I deserved better.

Both can be part of healing.

EMDR may help process memories connected to those experiences, but grief doesn't always need to be rushed through or "fixed."

Sometimes grief needs to be witnessed.

Then Comes the Behavioral Work

Another misconception about trauma therapy is that if we process enough memories, every survival behavior will simply disappear.

Sometimes behaviors shift remarkably quickly.

Sometimes they don't.

Your nervous system may finally understand that disagreement isn't inherently dangerous.

Wonderful.

Unfortunately, you may also have twenty-five years of experience saying:

"Whatever you want is fine!"

So now we practice having an opinion.

You may understand why boundaries feel dangerous.

Now comes actually setting one.

You may understand why someone's disappointment triggers panic.

Now we practice allowing someone to be disappointed without immediately trying to repair their feelings.

You may understand why you over-explain.

Now we're going to try saying:

"No, I can't make it Saturday."

Full stop.

No twelve-paragraph closing argument.

No supporting documentation.

No PowerPoint presentation entitled Why I Am Still a Good Person Despite Being Unavailable Saturday.

That's behavioral healing.

Insight matters.

Memory processing matters.

But eventually new learning has to enter real life.

EMDR for PTSD vs. C-PTSD May Look Something Like This

This isn't a rigid formula, but it can help illustrate the difference.

With more circumscribed PTSD, EMDR may place greater emphasis on:

Identifiable trauma → preparation → target memory → reprocessing → current triggers → future situations.

With complex trauma, treatment may look more like:

Safety and stabilization → understanding survival patterns → attachment work → parts work → carefully selected EMDR targets → stabilization → more processing → grief → present-day relationship work → behavioral change → additional EMDR targets as needed.

And these pieces may overlap rather than occur in a perfect sequence.

The goal isn't to make EMDR unnecessarily complicated.

It's to match treatment to the nervous system sitting in front of us.

So How Long Does EMDR Take for PTSD Versus C-PTSD?

There isn't an honest universal answer.

Research supports EMDR as a treatment for PTSD, and major clinical guidelines include EMDR among recommended trauma-focused psychotherapies for PTSD (Department of Veterans Affairs & Department of Defense, 2023; National Institute for Health and Care Excellence, 2018).

But the number of sessions an individual needs depends on much more than the diagnosis written in their chart.

A person with one clearly defined traumatic experience, strong current supports, good emotional regulation, and little dissociation may move through treatment very differently from someone with decades of developmental trauma, attachment wounds, multiple losses, dissociation, current instability, or deeply entrenched survival patterns.

With complex trauma, there may also be multiple important memory networks.

I'm powerless.

I'm unlovable.

I'm unsafe.

I'm responsible for everyone.

I don't matter.

Fortunately, we don't necessarily need to process every bad thing that has ever happened.

Because if that were the requirement, some of us would need to schedule EMDR until approximately 2047.

Instead, we're looking for experiences that appear to organize or feed present-day distress.

The goal isn't to excavate every painful memory.

It's to help your nervous system stop living today's life according to yesterday's rules.

Faster Isn't Necessarily Better

When someone has been suffering for years, it's completely understandable to want relief quickly.

But trauma therapy isn't a competition to see who can get to their worst memory fastest.

Being able to talk about a memory isn't necessarily the same as being ready to process it.

The question is whether we can approach traumatic material while maintaining enough connection to the present that new learning can occur.

Sometimes slowing down actually allows us to eventually go deeper.

For someone whose boundaries were repeatedly ignored, pacing can even become part of the healing.

We're teaching something different:

You have choices now.

You can say stop.

You can tell me something isn't working.

You don't have to perform therapy correctly.

You don't have to take care of your therapist.

You don't have to force yourself through something because an authority figure told you to.

Your nervous system gets a vote.

EMDR for Complex Trauma Isn't "Less Successful" EMDR

This may be the most important thing I want people to understand.

If someone else says they processed their trauma in four sessions and you've been doing trauma therapy for months, that doesn't automatically mean they're better at EMDR.

And it certainly doesn't mean you're failing.

You're two different nervous systems with two different histories.

When trauma occurred repeatedly over years, especially during development and within important relationships, treatment may need to address more than fear associated with specific memories.

We may be helping someone change what they learned about:

safety

love

trust

boundaries

conflict

their body

their needs

relationships

and their own worth.

EMDR can be an incredibly powerful part of that work.

But sometimes healing also happens through parts work.

Through grief.

Through attachment work.

Through learning emotional regulation.

Through practicing boundaries.

Through choosing different relationships.

And sometimes through sitting across from another human being and discovering that you can tell the truth, have needs, disagree, cry, become angry, take up space, and still remain connected.

That's trauma work too.

The goal isn't simply to make traumatic memories less upsetting.

It's helping someone build a life that is no longer organized around surviving what already happened.

And whether we're treating PTSD, complex PTSD, or a complicated trauma history that doesn't fit perfectly into either box, good EMDR isn't about getting through the protocol as quickly as possible.

It's about using the protocol thoughtfully enough to meet the person who's actually sitting in the room.

References

American Psychiatric Association. (2022). Diagnostic and statistical manual of mental disorders (5th ed., text rev.; DSM-5-TR). American Psychiatric Association Publishing. https://doi.org/10.1176/appi.books.9780890425787

Department of Veterans Affairs, & Department of Defense. (2023). VA/DoD clinical practice guideline for management of posttraumatic stress disorder and acute stress disorder. U.S. Department of Veterans Affairs.

National Institute for Health and Care Excellence. (2018). Post-traumatic stress disorder (NICE guideline NG116). NICE.

Shapiro, F. (2018). Eye movement desensitization and reprocessing (EMDR) therapy: Basic principles, protocols, and procedures (3rd ed.). Guilford Press.

World Health Organization. (2024). International classification of diseases for mortality and morbidity statistics (11th Revision). World Health Organization.