What causes Benign Paroxysmal Positional Vertigo (BPPV) to develop in the first place?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Benign paroxysmal positional vertigo (BPPV) occurs when tiny calcium crystals (otoconia) inside the inner ear become dislodged and shift into the semicircular canals, where they don't belong. When you change head positions—such as lying down, rolling over, or looking up—these misplaced crystals disrupt normal fluid movement, sending false signals to your brain and triggering brief but intense episodes of dizziness or spinning.

Because dizziness can stem from many causes beyond BPPV—including migraines, blood pressure issues, or inner ear infections—identifying the right cause is essential for effective treatment. Take a free, instant, online symptom check to better understand your symptoms and confidently navigate your next steps.

Reviewed for medical accuracy: 07/15/2026

Important Next Steps

Learn if BPPV symptoms need care today Discover likely causes of BPPV dizziness See if vertigo could be BPPV Find OTC relief for BPPV symptoms Find doctors who treat BPPV vertigo Discover home remedies for BPPV dizziness Understand if your dizziness needs urgent care

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Explanation

Benign Paroxysmal Positional Vertigo (BPPV) happens when tiny crystals in your ear, called otoconia, get loose and move into the wrong part of the inner ear. Normally, these crystals help you keep your balance. But when they move, they can cause dizziness, especially when you move your head in certain ways.

Causes of BPPV

Loose Crystals: The main cause of BPPV is when these crystals become dislodged.
Injury or Aging: Sometimes, a head injury or getting older can make these crystals move.
Unknown Causes: Often, doctors don't know why the crystals move, which is called idiopathic.

How It Feels

When the crystals move, you might feel like the room is spinning.
This can happen when you roll over in bed or look up quickly.

Understanding BPPV can help you know why you feel dizzy and what might help stop it. If you're experiencing these symptoms, you can use a free AI symptom checker to get personalized insights about your dizziness, or talk to a healthcare provider for further evaluation.

(References)

Fife TD. (2009). Benign paroxysmal positional vertigo. Seminars in neurology, 19834861.
Guerra J, & Devesa J. (2020). Causes and treatment of idiopathic benign paroxysmal .... Journal of otology, 33293917.
Tusa RJ. (2001). Benign paroxysmal positional vertigo. Current neurology and neuroscience reports, 11898559.

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