This sounds a bit like the punch line of a bad joke, doesn’t it? But believe it or not, it’s true.
Dizziness can be caused by loose crystals called “otoconia” in your inner ear, which is known as BPPV. Benign paroxysmal positional vertigo, or BPPV, is the most common cause of vertigo, and is also the most common vestibular (inner ear) disorder. BPPV occurs when tiny calcium crystals are displaced from either one or both of the otolith organs of the inner ear and fall down into one of the semicircular canals, disrupting the flow of the fluid of that canal.
What results from that disruption of fluid is essentially a false sense of motion. People with BPPV will most often report experiencing short episodes of severe vertigo with change in head and/or body position, such as turning over in bed or getting up and out of bed, tilting their head back in the shower to wash their hair, or turning their head from side to side while driving. The onset of vertigo can be very sudden and very frightening. And while the classic sign of BPPV is episodic severe vertigo related to changes in head position, many people experience a more mild or low grade constant unsteadiness between attacks or episodes.
Why do those crystals come loose?
About half of the time, the cause is...