In recent years, Eye Movement Desensitization and Reprocessing (EMDR) has become a buzzword in the world of mental health. Endorsed by celebrities like Prince Harry and recognized by the World Health Organization for treating PTSD, it is often hailed as a miracle cure. It promises to help people process traumatic memories faster than traditional talk therapy. However, like any powerful medical or psychological intervention, it is not without its risks.
If you are considering this treatment, you are likely looking for relief from pain, anxiety, or past trauma. But you might also be worried. You might be searching for the dangers of EMDR therapy to ensure you aren’t jumping from the frying pan into the fire. It is valid to be cautious. EMDR is not a relaxation exercise; it is essentially surgery for the mind. It involves opening up deep, often repressed wounds to clean them out and let them heal properly.
While EMDR is generally considered safe and effective when performed by a certified expert, “safe” does not mean “easy” or “pain-free.” In this comprehensive guide, we will explore the potential side effects, the risks of improper administration, and the real dangers of EMDR therapy. Our goal is not to scare you away from healing, but to arm you with the knowledge you need to navigate the process safely.
1. The Risk of Retraumatization
The most significant of the dangers of EMDR therapy is the possibility of being retraumatized. EMDR works by asking you to recall a distressing memory while focusing on bilateral stimulation (like moving your eyes back and forth). The goal is to desensitize the memory. However, if you dive into a traumatic memory too quickly, before you have built up enough coping skills, your brain can get flooded.
Overwhelming the Nervous System
Trauma lives in the nervous system. When you access a high-level trauma without proper preparation, your brain might react as if the trauma is happening right now. Instead of processing the memory, you relive it. This can reinforce the trauma pathways in the brain rather than clearing them.
The Importance of “Resourcing”
A skilled therapist will spend weeks, sometimes months, on the “Preparation Phase” (Phase 2). They teach you grounding techniques and “safe place” visualization. If a therapist tries to rush you into the eye movements (Phase 4) on the first or second visit, that is a red flag. Skipping the safety prep is one of the primary causes of the dangers of EMDR therapy.
2. Intense Emotional “Hangovers”
Many clients are unprepared for what happens after the session. EMDR is not like a massage where you leave feeling relaxed. You often leave feeling raw, exhausted, and exposed. One of the often-overlooked dangers of EMDR therapy is the emotional hangover that can last for days.
Unpredictable Mood Swings
You might find yourself crying uncontrollably at a grocery store or feeling sudden rages that seem to come out of nowhere. This is because your brain is continuing to process the data even after you leave the therapist’s office. The neural pathways are still firing.
For people who have to go back to a high-stress job or take care of young children immediately after a session, this can be debilitating. Without a plan for aftercare, this emotional instability can feel like a major setback in your mental health journey.
3. Increased Dissociation and “Checking Out”
Dissociation is a defense mechanism where the mind detaches from reality to avoid pain. It feels like you are floating outside your body or that the world isn’t real. For people with complex trauma (C-PTSD), the intensity of EMDR can trigger severe dissociation.
The Safety Valve
When the memory becomes too painful during a session, the brain might pull the emergency brake and dissociate. If the therapist doesn’t notice this happening, they might keep pushing. One of the subtle dangers of EMDR therapy is that you might spend the whole session dissociated.
This is dangerous because you aren’t actually processing the trauma; you are just practicing how to disconnect from it. This can make your dissociation symptoms worse in your daily life, making it harder to focus at work or connect with loved ones.
4. Uncovering Repressed Memories (Pandora’s Box)
The brain hides memories for a reason to protect you until you are ready to handle them. EMDR lowers the brain’s defenses to allow processing. However, this can sometimes open “Pandora’s Box,” releasing memories you didn’t even know you had.
The Surprise Factor
You might go in to treat a car accident, and suddenly, a memory of childhood abuse surfaces. This spontaneous retrieval can be shocking and destabilizing. If you do not have a strong support system outside of therapy, handling these new revelations can be dangerous.
This is one of the dangers of EMDR therapy that touches on the complexity of the human mind. If you are not stable enough to handle the unknown, the rapid resurfacing of old ghosts can lead to a mental health crisis.
5. Physical Side Effects and Somatic Pain
We often think of therapy as a mental process, but trauma is stored physically in the body. As EMDR releases the emotional charge, the body often reacts physically.
The Body Keeps the Score
Clients frequently report intense headaches, nausea, dizziness, or random muscle pains after sessions. This is the body releasing “stored” tension. While usually temporary, these physical symptoms can be distressing and disruptive.
In rare cases, people experience lightheadedness or fainting. Recognizing that these physical reactions are dangers of EMDR therapy (or at least uncomfortable side effects) helps you plan your day. You shouldn’t plan to run a marathon or give a big presentation right after a heavy processing session.
6. Vivid Dreams and Sleep Disturbances
Because EMDR mimics REM (Rapid Eye Movement) sleep the stage of sleep where we process emotions it kicks your dream cycle into overdrive. While your brain is re-wiring itself, your nights might become turbulent.
The Night Shift
You might experience extremely vivid, weird, or terrifying dreams. Nightmares might increase temporarily. While this is a sign the therapy is working, it leads to sleep deprivation. A lack of sleep makes it harder to regulate emotions during the day, creating a vicious cycle.
If you are already struggling with insomnia, the intensification of dream activity is one of the dangers of EMDR therapy regarding your overall physical health and energy levels.

7. Incompetent Administration by Unqualified Therapists
The biggest danger isn’t the therapy itself; it is the therapist. EMDR is a specialized tool. It requires rigorous training and certification. Unfortunately, some therapists take a quick weekend course and start using it without fully understanding the nuances.
The “Technician” vs. The Healer
A bad therapist will treat EMDR like a mechanical checklist: “Look here, move eyes, done.” They may fail to recognize when you are overwhelmed or dissociated. They may push you too hard because they want to see results.
Using EMDR without a strong therapeutic alliance (a bond of trust) is incredibly risky. The true dangers of EMDR therapy often lie in the hands of a practitioner who does not know how to hit the brakes when the client is speeding toward an emotional cliff.
How to Mitigate the Risks
Now that you know the dangers of EMDR therapy, does that mean you shouldn’t do it? Absolutely not. It means you should do it carefully.
- Verify Credentials: Ensure your therapist is certified by EMDRIA (EMDR International Association) or a similar reputable body.
- Take Your Time: Do not rush the preparation phase. If you don’t feel safe, tell your therapist to stop.
- Establish a “Stop Signal”: Agree on a hand gesture you can use during the session to stop immediately if it gets too intense.
- Plan for Self-Care: Clear your schedule after sessions. Nap, take a bath, or sit in nature.
Conclusion
EMDR is a transformative therapy that has given thousands of people their lives back. It can heal wounds that talk therapy cannot touch. However, it is a powerful intervention that demands respect. Ignoring the potential dangers of EMDR therapy is like ignoring the safety warnings on power tools it works great, but you can get hurt if you aren’t careful.
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FAQs
1. Is EMDR safe for people with heart conditions?
Generally, yes, but it can cause elevated heart rate and blood pressure due to anxiety during the recall of trauma. If you have a severe heart condition, you should consult your doctor and inform your therapist so they can monitor your stress levels. This is one of the physical dangers of EMDR therapy to be aware of.
2. Can EMDR make you worse?
Temporarily, yes. It is common to feel worse before you feel better, often called the “healing crisis.” However, if you feel consistently worse for weeks without relief, or if you feel suicidal, the therapy may be moving too fast or might not be the right fit for you.
3. Who should avoid EMDR therapy?
People who are currently in an active crisis (like an abusive relationship or severe substance abuse) should stabilize their life first. You need a safe environment to go home to. Additionally, those with dissociative identity disorder (DID) require highly specialized specialists to avoid the dangers of EMDR therapy.
4. How long do the side effects last after a session?
For most people, the “hangover” lasts 24 to 48 hours. It involves fatigue and moodiness. If the distress lasts longer than that, you should discuss “re-closing” the session better with your therapist next time.

