Benign paroxysmal positional vertigo (BPPV) is a common inner ear disorder that causes brief episodes of dizziness. It occurs when tiny calcium crystals in the inner ear become dislodged and move into the wrong part of the ear, affecting balance. This can happen during certain head movements, such as turning over in bed or looking up. Symptoms of BPPV include a spinning sensation, lightheadedness, and unsteadiness, typically lasting less than a minute. While it is not life-threatening, it can be disruptive. Treatment often involves specific head and body movements, known as canalith repositioning maneuvers, to help relocate the crystals.