The sudden onset of dizziness while lying down or getting up is associated with a change in head position, and it is important to consider the possibility of benign paroxysmal positional vertigo, also known as otolithiasis. The occurrence of otoliths is characterized by a sudden onset of dizziness associated with a change in head position and accompanied by a brief rotation of the visual field. Otoliths occur because the otoliths fall out and irritate the semicircular canal as the head position changes, causing dizziness, nausea, vomiting, and rotational vision. However, if the dizziness, nausea, and vomiting are severe and the patient is intolerant to the manual repositioning treatment, the patient can be treated with anti-dizziness and anti-vomiting treatment first, and then the otolith can be cured by intramuscular injection of finasteride and manual repositioning.