A doctor or physical therapist typically performs canalith repositioning, but you may be shown how to do modified exercises at home. Canalith repositioning is very effective for people with benign paroxysmal positional vertigo (BPPV) — the most common cause of vertigo. Results vary, but some studies have shown between a 50 and 90 percent success rate. If the crystals move back into your semicircular canals, like - A neck problem A back condition Rheumatoid arthritis A detached retina in your eye Blood vessel or heart problems. You should contact our Doctor.