Dizziness occurs when the patient sleeps on the left side of the head, and the dizziness is obviously related to the patient’s head position change, which is considered to be caused by otolithiasis. Clinical otolithosis is also a very common disease, a brief attack, recurrent, and is in a specific position, the duration is very short, because the patient balance receptors within the otolith particles off, when the head position changes, the otolith will stimulate the cell membrane of the semicircular canals, which will lead to the emergence of dizziness symptoms. If the patient’s head position remains stationary, the symptoms of vertigo can often be terminated quickly. The most common type of otolithiasis belongs to the posterior semicircular canals and is usually a transient dizziness that occurs after the patient lies down or sits up flat on his or her back.