What is Benign Paroxysmal Positional Vertigo and how is it diagnosed?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Benign Paroxysmal Positional Vertigo (BPPV) is one of the most common causes of dizziness and vertigo, occurring when tiny calcium crystals in the inner ear become dislodged and shift with head movement. Symptoms are typically triggered by changes in head position, such as rolling over in bed, looking up, or bending down. Doctors diagnose BPPV using specific physical tests, like the Dix-Hallpike maneuver, which check for nystagmus—an involuntary eye movement that signals inner ear disturbance.

Dizziness can stem from many causes beyond BPPV, including migraines, low blood pressure, or neurological conditions. Because the right treatment depends on the exact cause, understanding your symptoms early is key. Take a free, instant, online symptom check to better identify what may be behind your dizziness and confidently plan your next steps.

Reviewed for medical accuracy: 07/15/2026

Important Next Steps

Learn if dizziness could be BPPV Discover whether your vertigo needs care See if symptoms suggest a serious cause Find OTC options for vertigo relief Find a doctor for dizziness evaluation Discover home remedies for positional vertigo Understand what’s causing your spinning episodes

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Explanation

Benign Paroxysmal Positional Vertigo, or BPPV, is a condition that causes sudden dizziness or a spinning sensation when you move your head in certain ways. It happens because tiny crystals in the inner ear become dislodged and interfere with balance signals.

Diagnosis

Dix-Hallpike Test: This is a common test where the doctor quickly moves your head to see if it causes dizziness and nystagmus, which is a rapid, involuntary eye movement.
Roll Test: This test involves turning the head while lying down to see if it triggers vertigo, especially if the Dix-Hallpike test is negative.

Doctors use these tests to see how the eyes react to head movements. If the eyes move in a certain way, it helps confirm BPPV. If you're experiencing dizziness or vertigo symptoms, you can get personalized insights by taking a free AI symptom checker test to help you understand your condition better. These tests are important because they help differentiate BPPV from other causes of dizziness, ensuring proper treatment.

(References)

Lee SH, & Kim JS. (2010). Benign paroxysmal positional vertigo. Journal of clinical neurology (Seoul, Korea), 20607044.
Furman JM, & Cass SP. (1999). Benign paroxysmal positional vertigo. The New England journal of medicine, 10564690.
Cole SR, & Honaker JA. (2022). Benign paroxysmal positional vertigo: Effective diagnosis .... Cleveland Clinic journal of medicine, 36319052.

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