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Is My Dizziness From a Stroke or an Inner Ear Problem? An ENT in Gangnam, Seoul Explains

Answered by Dr. Kim Yoo Suk, MD · Board-certified otolaryngologist · Former professor, Yonsei & Ajou University · Consultations in English

Inner ear causes are far more common, but stroke must not be missed

Dizziness is a broad term covering spinning (vertigo), lightheadedness, and imbalance. The balance system relies on the inner ears, vision, body sensors, and the brain working together. Problems in the inner ear (peripheral causes) are the most common source of true vertigo. Problems in the brain (central causes), including stroke, are less common but more dangerous.

Emergency warning signs: call 119

• Double vision or sudden vision loss
• Slurred speech or difficulty finding words
• Facial drooping
• Weakness, numbness, or clumsiness of an arm or leg
• Severe, sudden headache or neck pain
• Inability to stand or walk, even with support
• Difficulty swallowing
• New dizziness in someone with high blood pressure, diabetes, atrial fibrillation, or prior stroke, particularly if constant

Strokes affecting the back of the brain can cause vertigo with few other obvious signs, so persistent, severe new vertigo deserves prompt medical evaluation even without these features.

Patterns that suggest an inner ear cause

• BPPV: brief spinning lasting seconds, triggered by head position changes such as rolling over in bed
• Vestibular neuritis: sudden, severe, continuous vertigo for days, often after a viral illness, with normal hearing
• Meniere's disease: attacks of vertigo for 20 minutes to several hours, with fluctuating hearing loss, tinnitus, and ear fullness
• Labyrinthitis: vertigo with sudden hearing loss in one ear

How doctors tell the difference

Specialists use bedside examination of eye movements to separate inner ear from brain causes. Key elements include the head impulse test, the pattern and direction of nystagmus (involuntary eye movements), and a test for vertical eye misalignment. Positional tests diagnose BPPV. When findings are worrying, urgent MRI is needed.

What we do at Gangnam Yonsei ENT

Dr. Kim Yoo Suk, a board-certified otolaryngologist and former Yonsei clinical assistant professor, evaluates dizziness as part of a program that covers BPPV, Meniere's disease, vestibular neuritis, and central causes. Using Frenzel goggles, eye movements are magnified so subtle nystagmus patterns can be identified. A hearing test helps identify inner ear disease.

When an inner ear cause is confirmed, treatment may begin the same day, for example an Epley maneuver for BPPV. If any sign suggests a central cause, you will be referred urgently to an emergency department or neurology for imaging. The clinic does not delay referral when a stroke is possible.

Lightheadedness is different

Feeling faint or about to pass out, especially when standing up, is more often related to blood pressure, dehydration, heart rhythm, blood sugar, or medication than to the inner ear. These causes may need evaluation by internal medicine or cardiology.

Practical safety

• Do not drive when dizzy
• Sit or lie down at the first sign of vertigo
• Have someone accompany you to appointments

English consultations are available near Gangnam-gu Office Station; see location and hours. Related: vestibular neuritis recovery and Meniere's disease triggers.

Related questions

Can a stroke cause only dizziness?

Occasionally, yes. Strokes in the cerebellum or brainstem can cause vertigo and imbalance with few other obvious symptoms. This is why sudden, severe, continuous vertigo, especially in people with vascular risk factors, needs prompt medical evaluation.

What number do I call for an ambulance in Korea?

Dial 119 for emergency medical services in Korea. Interpretation services may be available. If you suspect a stroke, note the time symptoms started, because treatment options depend on how quickly you reach a hospital.

Is dizziness from the inner ear dangerous?

Inner ear causes like BPPV and vestibular neuritis are usually not life-threatening, but they can cause falls, injuries, and significant disruption. Accurate diagnosis allows effective treatment and helps rule out more serious causes.

This answer is general medical information written and reviewed by an ENT specialist. It is not a diagnosis. Please see a doctor for an examination. In an emergency in Korea, call 119.