Benign paroxysmal positional vertigo

Benign paroxysmal positional vertigo (BPPV) is the leading cause of vertigo. BPPV is due to movement of inner ear crystals that move in response to head motion. It causes very brief, repeated episodes of vertigo provoked by certain movements, such as lying down or rolling over in bed. It can be successfully treated with exercises designed to reposition the crystals.