BPPV occurs when tiny calcium crystals called otoconia come loose from their normal location on the utricle, a sensory organ in the inner ear. If the crystals become detached, they can flow freely in the fluid-filled spaces of the inner ear, including the semicircular canals (SCC) that sense the rotation of the head.

What is the most common cause of positional vertigo?

Cause. Benign paroxysmal positional vertigo (BPPV) is caused by a problem in the inner ear. Tiny calcium "stones" inside your inner ear canals help you keep your balance. Normally, when you move a certain way, such as when you stand up or turn your head, these stones move around.

How long does positional vertigo last?

Benign paroxysmal positional vertigo (BPPV)

BPPV is one of the most common causes of vertigo. The average episode reoccurs but usually lasts for one minute or less.