What would cause one to feel dizzy, the whole place is spinning. This happens if I holds my head down or turns it?

BPPV. Sensation of spinning which is related to movement of head and resolves shortly after cessation of movement is usually benign paroxysmal positional vertigo. If there are other associated signs or symptoms such as hearing loss or change, pain in ear or persistence of symptoms, one should be evaluated. See treatment of bppv on-line.