The main symptom is vertigo, which is very intense, short-lived and not in the position of the trigger, and then the symptoms disappear. The upper hemispheric otolith is associated with nausea, vomiting and other discomforts for a few seconds each time, and the vertigo improves significantly when the position is restored; it is usually not accompanied by hearing loss. The diagnosis of otoliths can be confirmed by positional testing and which semicircular canal otolith it is.