Can EMDR Cause Temporary Lightheadedness?

Can EMDR Cause Temporary Lightheadedness?

Short Answer: Temporary lightheadedness can sometimes occur during or shortly after Eye Movement Desensitization and Reprocessing (EMDR), but it is not established as a standard EMDR side effect. Emotional activation can change breathing and other automatic body responses, and faster or deeper breathing can sometimes cause a lightheaded or dizzy feeling. EMDR studies have also documented changes in breathing and autonomic activity during processing. If lightheadedness occurs, it may help to pause, reconnect with the present, let your breathing settle naturally, and notice whether the feeling passes.

Key Takeaways

• Some people may temporarily feel lightheaded during or after EMDR.
• Lightheadedness is not a required or well-established standard EMDR reaction.
• Emotional activation can change breathing, and overbreathing can cause lightheadedness.
• EMDR research has found temporary changes in respiration and other autonomic responses during processing.
• Feeling lightheaded does not mean that EMDR is working better or that processing is especially deep.
• If the sensation appears, you can pause, orient to the room, and let your breathing return to a comfortable rhythm.
• Ordinary factors such as hunger, dehydration, standing up quickly, heat, or tiredness can also contribute.
• The same practical approach applies during therapist-guided, online, and self-guided EMDR.

What Does Lightheadedness Feel Like?

People use the word lightheaded in slightly different ways.

You might describe it as:

• Feeling briefly woozy
• Feeling slightly faint
• Feeling unsteady
• Having a “floating” sensation
• Feeling as though you need to sit still for a moment
• Feeling mentally fuzzy for a short time

Lightheadedness is not always the same thing as vertigo, which usually involves a sensation that you or the surroundings are spinning.

For an EMDR session, the most useful information may simply be:

“I feel a little lightheaded right now.”

You do not have to immediately determine exactly why.

Why Could Lightheadedness Happen During EMDR?

EMDR can involve focusing on emotionally meaningful memories, thoughts, images, beliefs, or body sensations.

Emotional activation can affect automatic body processes such as:

• Breathing
• Heart rate
• Muscle tension
• Sweating
• Peripheral blood flow

Research examining physiology during EMDR has documented changes in respiration and measures of autonomic activity during stimulation.

Those changes do not mean EMDR normally causes dizziness.

They simply show that the body can shift physiologically while processing emotional material.

Can Changes in Breathing Make You Lightheaded?

Yes.

One possible explanation for temporary lightheadedness is a change in breathing.

When someone becomes emotionally activated, breathing may become faster or deeper without them deliberately changing it.

If breathing becomes excessive for what the body currently needs, sometimes called hyperventilation or overbreathing, carbon dioxide levels in the blood can temporarily fall. That can lead to lightheadedness, dizziness, tingling, difficulty concentrating, or a noticeable heartbeat.

You may not even realize your breathing changed.

Does EMDR Cause Hyperventilation?

Not generally.

Hyperventilation should not be presented as an expected part of EMDR.

However, emotionally activating material can sometimes change how someone breathes, just as anxiety, stress, fear, excitement, or another strong emotion can.

One physiological EMDR study found that respiration rate increased during ongoing stimulation while other measures of arousal changed. Across the full sessions, however, physiological activity generally decreased.

So EMDR physiology is better understood as changing during processing rather than moving in one fixed direction.

Is Lightheadedness Common During EMDR?

There is not strong evidence establishing how frequently lightheadedness occurs specifically during EMDR.

That distinction matters.

Lightheadedness can occur during emotional activation generally, and breathing changes provide one possible explanation.

But it would be inaccurate to say:

“EMDR normally makes people lightheaded.”

Many people may never experience it.

What Should You Do if You Feel Lightheaded During Processing?

First, notice it.

You might say:

“I feel a little lightheaded.”

If you are doing therapist-guided EMDR, tell the therapist during the next check-in.

You can also pause briefly if that feels useful.

Simple ways to reconnect with the present include:

• Feeling your feet on the floor
• Looking around the room
• Noticing the chair supporting you
• Letting your breathing settle into a comfortable rhythm
• Taking a short pause before continuing

You do not need to push through the sensation just to keep the session moving.

Should You Take Deep Breaths?

Not necessarily.

When people feel lightheaded, they sometimes deliberately take repeated large breaths.

But if the lightheaded feeling is related to overbreathing, repeatedly taking very deep breaths may continue the same breathing pattern.

Guidance for hyperventilation focuses instead on slowing breathing and allowing it to become more controlled.

During EMDR, the simpler approach may be to pause and let your breathing become comfortable again rather than forcing a particular breathing exercise.

Can Grounding Help?

It can.

If the sensation is happening while you are highly focused on emotional material, grounding may help shift more attention toward your current environment.

You could:

• Look at several objects in the room
• Notice where your feet are
• Feel the surface beneath your hands
• Stand up slowly after the sensation has settled
• Focus briefly on something ordinary around you

Grounding does not have to eliminate every sensation.

The goal is simply to help you reconnect with the present.

Does Lightheadedness Mean the Session Is Too Intense?

Not automatically.

A brief lightheaded feeling may simply reflect a temporary change in breathing, emotional arousal, position, or another ordinary factor.

The sensation itself does not tell you how intense the psychological processing is.

If it distracts you, pause.

If it settles quickly and you feel ready to continue, you may continue at a workable pace.

Does Lightheadedness Mean EMDR Is Working?

No.

Lightheadedness is not a marker of successful processing.

You do not need to feel:

• Dizzy
• Lightheaded
• Tingly
• Warm
• Cold
• Shaky
• Physically different

for EMDR to be effective.

EMDR can involve changes in thoughts, emotions, memories, beliefs, body sensations, and reactions to present situations.

No single physical response can tell you whether the session is working.

What If You Feel Completely Normal Physically?

That is also completely possible.

Many EMDR sessions may involve little or no noticeable physical change.

You might instead notice:

• A memory feels less vivid
• An emotion shifts
• A new thought appears
• A belief feels different
• A related memory comes up

Or you may not notice an obvious change immediately.

None of these experiences requires lightheadedness.

Could Something Else Be Causing It?

Yes.

Lightheadedness has many ordinary possible causes.

These can include:

• Standing up quickly
• Not eating for a while
• Dehydration
• Heat
• Fatigue
• Anxiety or stress
• Changes in breathing

Dizziness and lightheadedness can also have causes unrelated to EMDR.

So if the sensation appears during a session, it is reasonable to notice the timing without automatically assuming that EMDR itself caused it.

What If You Have Not Eaten or Had Much Water?

That may be relevant.

If you started the session hungry, thirsty, tired, or overheated, those ordinary factors may contribute to feeling lightheaded.

If needed, you can pause and take care of basic comfort.

You do not have to interpret every physical sensation as part of processing.

Can Eye Movements Themselves Make You Feel Odd?

Some people may find sustained visual tracking unfamiliar, especially at first.

If visual bilateral stimulation feels uncomfortable or distracting, it is reasonable to pause and notice what is happening.

In therapist-guided EMDR, different bilateral stimulation methods may be available depending on the situation.

The important point is not to assume that feeling lightheaded is proof that the eye movements are having a therapeutic effect.

Should You Keep Going if You Feel Lightheaded?

You do not have to immediately continue.

Pause if that seems useful.

Give yourself a moment to:

• Reorient
• Notice your breathing
• Sit comfortably
• Let the sensation settle

Then decide how you feel.

EMDR includes pauses and check-ins; continuing without interruption is not the goal.

Can Lightheadedness Happen After the Session?

It may occasionally be noticed shortly afterward, particularly if you were emotionally activated or your breathing changed during the session.

But lightheadedness after EMDR should not automatically be labeled “continued processing.”

It may also reflect ordinary factors such as standing up after sitting for a long time, hunger, dehydration, tiredness, or temperature.

Notice the sensation without assuming a specific explanation.

Should You Write It Down?

Only if it seems meaningful.

For example:

“Felt briefly lightheaded during the part about the accident; passed after a pause.”

That may be useful if you notice the same pattern again.

You do not need to keep a detailed record of every physical sensation.

What If It Happens Repeatedly?

If you repeatedly become lightheaded during EMDR, it may be useful to notice the circumstances.

For example:

• Does it happen when your breathing speeds up?
• Does it happen when you stand afterward?
• Does it occur only with a particular target?
• Were you hungry or dehydrated?

In therapist-guided EMDR, you can mention the pattern to your therapist.

If lightheadedness is frequent, persistent, happens outside EMDR as well, or leads to fainting, it is reasonable to discuss it with a healthcare professional because dizziness and lightheadedness can have many causes unrelated to therapy.

What About Therapist-Guided Online EMDR?

The same principles apply during online therapist-guided EMDR.

If you feel lightheaded, tell the therapist and pause if needed.

Because you are in your own environment, you can also check simple things such as:

• Room temperature
• Whether you need water
• Whether you have been sitting in one position for a long time

Online delivery does not automatically make lightheadedness more or less meaningful.

What About Self-Guided EMDR?

The same practical approach applies during Virtual EMDR, the structured self-guided online program.

Virtual EMDR users manage their own pacing, pauses, and available visual or audio bilateral stimulation settings.

If you feel temporarily lightheaded:

• Pause the session.
• Orient yourself to the room.
• Let your breathing settle comfortably.
• Take care of basic needs such as water if needed.
• Continue only when you feel ready.

You do not need to increase or change bilateral stimulation because the sensation occurred.

Conclusion

Temporary lightheadedness can sometimes occur during or shortly after EMDR, but it should not be treated as a standard EMDR reaction.

Emotional activation can change breathing, and overbreathing is one well-established cause of temporary lightheadedness. EMDR research also shows that breathing and other autonomic responses can shift during processing.

But many other ordinary factors can cause the same sensation.

You do not need to interpret lightheadedness as evidence that processing is especially powerful—or that something has gone wrong.

If you feel lightheaded during EMDR, pause, reconnect with the present, let your breathing settle naturally, and continue when you feel ready rather than turning the sensation into a measure of the session.