EMDR stands for Eye Movement Desensitization and Reprocessing. It is a structured therapy that uses guided eye movements or other back-and-forth stimulation while you briefly hold a disturbing memory in mind. The full protocol has eight phases, and treatment usually unfolds over multiple sessions rather than all at once.
The eight phases are: history-taking, preparation, assessment, desensitization, installation, body scan, closure, and re-evaluation. You do not have to remember or manage the steps yourself. A trained therapist leads each phase and decides when you are ready to move to the next one.
What Is EMDR and How Does It Work?
EMDR was developed in the late 1980s by psychologist Francine Shapiro. It is now recognized as a treatment for post-traumatic stress disorder (PTSD) by major clinical bodies, including the World Health Organization and the American Psychological Association.
The therapy rests on the idea that unprocessed traumatic memories stay stored in a raw, activated form. When something reminds you of the event, the memory can flood back with the original intensity. EMDR aims to help the brain reprocess that memory so it becomes less distressing and better integrated with the rest of your experience.
During processing, the therapist asks you to bring up a specific memory while simultaneously paying attention to something external — most often horizontal eye movements, but sometimes tapping or sounds. You do this in short sets, then pause and report what came up.
Here is where honesty matters. The eye movements are the most studied and most debated part of EMDR. Some researchers believe the dual attention — holding a memory while tracking a moving object — taxes working memory in a way that reduces the memory’s vividness. Others argue the benefit comes from the broader therapy structure, not the eye movements specifically. Research comparing EMDR with and without the eye movements has produced mixed results. What is well established is that EMDR as a complete protocol can reduce PTSD symptoms. Why it works is still an open question.
How Do You Do EMDR? The Eight Steps and Phases Explained
The eight phases are not eight separate appointments. They are stages within a course of treatment. Early phases may take one or several sessions. The processing phases often span many sessions, depending on your history and how you respond.
Phase 1: History-Taking
The therapist learns about your background, your current struggles, and the memories or themes that might become targets for processing. You also discuss your goals for therapy. No processing happens yet.
Phase 2: Preparation
This phase builds the skills and safety you need before touching difficult material. The therapist teaches calming techniques, such as breathing exercises or a “safe place” visualization. You also learn how to signal that you want to pause. The therapist will not begin processing until you can manage distress reasonably well. This phase can take more than one session, and that is normal.
Phase 3: Assessment
You and the therapist pick one specific memory to work on. You identify the image that represents it, the negative belief you hold about yourself connected to it (for example, “I am powerless”), and the positive belief you would rather hold (“I am in control”). You also rate your distress and how strongly you believe the positive statement. These ratings become a baseline the therapist returns to later.
Phase 4: Desensitization
This is the processing phase most people picture. You hold the target memory in mind while following the therapist’s fingers with your eyes, or while receiving taps or tones. After a short set, you pause and report whatever surfaced — a thought, a feeling, a body sensation, a new image. Then you continue. This repeats until your distress rating drops substantially.
Phase 5: Installation
Once distress has lowered, the focus shifts to strengthening the positive belief you identified earlier. You pair that belief with the memory while doing more sets of stimulation. The goal is for the positive belief to feel true, not just intellectually correct.
Phase 6: Body Scan
You bring the memory and positive belief to mind and scan your body for any remaining tension or discomfort. If something shows up, it becomes the focus of further processing. This step catches distress that does not surface as words or emotions.
Phase 7: Closure
Every session ends with closure, whether or not processing is finished. The therapist uses calming techniques to help you return to a stable state before you leave. You may be given a log to record any thoughts, dreams, or memories that come up between sessions.
Phase 8: Re-Evaluation
At the start of the next session, the therapist checks in on what happened since last time. Did the memory stay calmer? Did new material surface? Based on that, you either continue with the same target or move to a new one. Re-evaluation happens before every processing session, not just once.
What Does an EMDR Session Actually Feel Like?
People often expect something dramatic. In practice, most sessions are quiet and repetitive. You sit in a chair, sometimes with a light bar or tappers in your hands. The therapist guides you through short bursts of attention, then asks, “What do you notice now?”
Emotions can rise during processing. It is common to feel sadness, anger, or anxiety mid-session. It is also common to feel little at all in the moment and notice shifts afterward. Neither response predicts how well treatment will go.
Between sessions, some people report vivid dreams or unexpected memories. Others notice nothing unusual. Both are within the normal range.
How Long Does EMDR Take?
There is no fixed timeline. For a single-incident trauma, some people report meaningful relief in a handful of sessions. For longstanding or repeated trauma, treatment commonly takes months. Complex trauma with early, ongoing experiences often requires longer and may need a modified pace.
No clinical guideline states a standard number of sessions that applies to everyone. Anyone who promises a specific session count before assessing your history is guessing.
What Are the Risks and Side Effects?
EMDR is generally considered well tolerated when delivered by a trained clinician. That said, it is not risk-free, and honest sources say so.
- Temporary increase in distress during or shortly after processing
- Vivid dreams or intrusive memories between sessions
- Fatigue or emotional sensitivity for a day or two after a session
- Dizziness or eye strain from the eye movements in some people
People with certain conditions need extra care. Those with dissociative disorders, active psychosis, or unstable bipolar disorder may not be good candidates for standard EMDR without significant modification. Eye movement protocols may also be inappropriate for some people with certain eye conditions or neurological issues. A qualified therapist screens for these during the history-taking phase.
If you are considering EMDR, the most important safety factor is the therapist’s training and experience, not the technique itself.
Who Should Consider EMDR — and Who Should Not?
EMDR is best supported for PTSD and trauma-related conditions. Some evidence also exists for its use in anxiety, depression, and phobias, though the research base is smaller and less consistent than for PTSD.
It is not a first-line approach for every mental health concern. For conditions like schizophrenia, active substance withdrawal, or acute suicidality, stabilization comes first. EMDR may be added later if appropriate.
If you are unsure whether EMDR fits your situation, that is a conversation to have with a licensed mental health professional who can assess your history. No article can make that call for you.
Is EMDR Better Than Other Trauma Therapies?
The evidence does not support a clear winner. Trauma-focused cognitive behavioral therapy and EMDR both have solid research support for PTSD, and clinical guidelines generally list both as recommended options. Some studies find them roughly comparable. Others find slight differences that do not hold up consistently across research.
What matters more than the method is whether you can engage with it, whether you trust your therapist, and whether the therapist is properly trained in the approach they are using. A therapy that fits you beats a “better” therapy you cannot stick with.
Frequently Asked Questions
How many EMDR sessions does it take to work?
There is no fixed number. Single-incident trauma may improve in a few sessions, while complex or longstanding trauma often takes months. No clinical guideline sets a standard session count that applies to everyone.
Do I have to talk about my trauma in detail during EMDR?
No. You briefly bring the memory to mind during processing but do not need to describe it aloud in full. This is one reason some people choose EMDR over talk-heavy approaches.
Can EMDR be done online?
Yes, many therapists offer EMDR through video sessions using screen-based eye movements or tapping instructions. Whether it works as well as in-person delivery is not firmly established, though some studies suggest it can be effective.
Is EMDR safe for children?
EMDR has been studied in children and adolescents, and some research supports its use for trauma in younger populations. It should only be delivered by a clinician trained to work with children, and the protocol is often adapted.
