”Otoliths” is the medical term for benign paroxysmal positional vertigo. So, what is “otolith”? What is “benign paroxysmal positional vertigo”? It turns out that there is a tube in the inner ear of human body called otolithic apparatus, whose main function is to feel the stimulation of linear acceleration, cause the sensation of position and regulate the body movement. There is a capsule inside the otolithic apparatus, and there is a layer of otolithic membrane on the surface of the capsule with many calcium carbonate crystals called otoliths, just like a piece of cloth decorated with many diamonds, which is used to regulate the movement of the otolithic membrane. When some factors cause the otolith to fall off, it floats in the semicircular canal like sand and dust, and when it floats in a specific position, once the position changes these otoliths may cause vertigo, which lasts less than 1 minute, but the sky spins around and gets better when the head is fixed. This is called “benign paroxysmal positional vertigo”. The main symptom of “otolaryngitis”: brief rotational vertigo that occurs when the head moves rapidly to a certain position. The most common symptoms are vertigo when sitting up in bed, lying down, turning from side to side in bed, bending over or looking up. It is most common in middle-aged and elderly patients and may be associated with, or secondary to, the following factors: 1. Aging degenerative changes when the otolithic membrane is dislodged into the semicircular canal and deposited there. 2.Trauma: After cranial trauma or accelerated head movement, otoliths may be dislodged into the semicircular canal. 3.Ear diseases: middle ear mastoid infections such as viral labyrinthitis, chronic suppurative otitis media, exolymphatic fistula, and Meniere’s disease in remission can lead to otolith dislodgement. 4. Insufficient blood supply to the inner ear: Insufficient blood supply to the inner ear due to arteriosclerosis and hypertension, which can lead to the thinning of the colloid membrane of the capsule and the dislodgement of the otolith into the hemi-regular canal. ”The main treatment for otolithiasis is to reset the otolith, that is to say, to rotate the otolith out of the semicircular canal and back into the otolith apparatus through manual resetting, so that it cannot cause vertigo. After resetting, patients with otoliths should avoid strenuous head movements, avoid lying on the affected side for 2-3 days, and elevate the head position appropriately for 2-3 days when sleeping.