Post-Earthquake Dizziness Syndrome: Understanding, Coping, and Managing

Overview

In the aftermath of a significant seismic event, such as the M7.7 earthquake on March 28 affecting Myanmar, Thailand, and neighboring countries, many individuals report a lingering sensation of dizziness, vertigo, or imbalance. This phenomenon, often referred to as Post-Earthquake Dizziness Syndrome (PEDS) or "Jishin-yoi" (地震酔い) in Japanese (literally “earthquake sickness”), is a recognized condition triggered by sensory mismatch and psychological stress.

What Causes Dizziness After an Earthquake?

1. Sensory Conflict Mechanism

Your body relies on three systems to maintain balance:

Visual system (eyes)
Vestibular system (inner ear)
Somatosensory system (proprioception)

During an earthquake, these systems receive conflicting sensory information:

Your inner ear may detect movement.
Your eyes may see stillness.
Your body may feel vibrations inconsistently.

This mismatch leads to cerebral confusion, producing symptoms like:

Vertigo (spinning sensation)
Disequilibrium (off-balance feeling)
Lightheadedness or motion sickness

This is similar to what people experience during seasickness or virtual reality disorientation.

2. Psychological Contributors

Stress, anxiety, and fear during or after a disaster activate the autonomic nervous system, triggering:

Hyperventilation
Increased adrenaline
Muscle tension

These can further exacerbate feelings of dizziness and bodily discomfort, creating a psychosomatic loop where fear fuels physical symptoms.

Recognizing the Symptoms of PEDS

Symptoms may appear hours to days after the event and include:

Sensation of swaying or rocking, especially while stationary
Difficulty concentrating or unsteady gait
Anxiety or panic episodes
Nausea or mild headaches
Fatigue or a sense of "floating"

These symptoms are generally self-limited but can persist if unmanaged.

Who Is More at Risk?

Women aged 30–50 (possibly due to hormonal sensitivity)
Individuals with migraine history or motion sickness
People with vestibular disorders or inner ear problems
Those who were in high-rise buildings during the quake
People experiencing high anxiety or PTSD

What Can You Do?

✅ Self-Care and Immediate Relief

Focus on a fixed point: Helps stabilize visual-vestibular conflict.
Close your eyes and breathe deeply: Reduces sensory input and calms the nervous system.
Stay hydrated: Dehydration worsens dizziness.
Lie down in a safe place: Avoid falls during sudden vertigo.
Sleep well: Rest helps the brain recalibrate.

✅ Over-the-Counter Medications (Supportive Treatment)

If symptoms persist or are disruptive:

Dimenhydrinate (Dramamine): 50 mg po tid prn for motion sickness
Meclizine: 25 mg po bid prn for vertigo

⚠️ Use with caution in the elderly due to sedation. Do not drive or operate machinery while medicated.

When to See a Doctor?

Seek medical evaluation if:

Dizziness is worsening or persistent beyond 1–2 weeks
You experience true vertigo (room spinning), hearing loss, or tinnitus
There are signs of inner ear damage (e.g., from trauma)
There's a history of neurological disorders
You have difficulty walking, double vision, or slurred speech (rule out central causes)

In rare cases, central vestibular causes or stroke should be excluded with neurological examination and imaging.

Management Summary Table

Problem	Type	Management	Medication Example
Post-Earthquake Dizziness Syndrome	Supportive	Focus on sensory integration, rest, hydration, and reassurance	Dimenhydrinate 50 mg po tid prn
Stress/Anxiety Component	Supportive	Mindfulness, breathing exercises, short-term anxiolytics if needed	Diazepam 2 mg po hs prn (short term)
Persistent Vertigo	Definitive	Refer to ENT for vestibular testing ± imaging	Meclizine 25 mg po bid prn

Public Health Advice

Educate your community that this reaction is common and usually harmless.
Encourage those affected to talk about their experience and seek mental health support if necessary.
Avoid stigmatizing dizziness as weakness or exaggeration—it's neurophysiologically real.

Conclusion

Post-Earthquake Dizziness Syndrome is a real, often under-recognized response to seismic trauma. Understanding its pathophysiology and management empowers survivors to cope and recover better. While it’s mostly benign, persistent or atypical symptoms deserve thorough evaluation to rule out inner ear or neurological disease.