What BPPV Actually Is
Inside your inner ear, three fluid-filled canals track head movement. Sitting next to them is a small chamber called the utricle, which contains tiny calcium carbonate crystals called otoconia. When one of these crystals breaks loose and drifts into a semicircular canal, it sends the brain a false signal every time the head moves in a particular direction. The brain interprets this as spinning. That is the entirety of BPPV: a loose crystal in the wrong place.
