Doctors don't know for sure what causes BPVC. Some doctors think it is related to problems of the inner ear that affect balance. For example, some doctors think BPVC is similar to a different disorder which often happens in adults over 50. This disorder is called "benign paroxysmal positional vertigo" (BPPV). BPPV is a "vestibular disorder" - a disorder in the inner ear which affects balance. 