Sudden dizziness (hereafter referred to as sudden deafness) is a sudden onset of sensory nerve deafness of unknown origin. The incidence increases with age, and 3/4 of the patients are 40 years old or older at the time of onset of the disease, and the effect of treatment is directly related to the time of consultation. The symptoms of sudden onset of dizziness are as follows: I. Deafness This disease is aggressive and hearing loss can occur in an instant, within a few hours or a few days, or in the morning when deafness is suddenly felt. In chronic cases, the deafness can gradually worsen and stop progressing only after a few days. The degree of deafness can range from mild to total deafness. It can be temporary or permanent. Most often it is unilateral, but occasionally it occurs bilaterally or sequentially. It can be cochlear deafness or postcochlear deafness. Tinnitus Tinnitus occurs before and after deafness and accounts for about 70% of cases. It usually appears a few hours before the deafness, mostly as a buzzing sound, and can last for a month or more. Some patients may emphasize the tinnitus and ignore the hearing loss. Vertigo About 2/5 days 1/2 of sudden deafness is accompanied by varying degrees of vertigo, of which about 10% are severe deafness, nausea, vomiting, which can last for 4-7 days, and mild dizziness can exist for more than 6 weeks. A small number of patients present with vertigo as the main symptom, which can be misdiagnosed as Meniere’s disease. The dizziness is relieved after a few days and does not recur. Blocked ears The blocked ears usually precede the deafness. If vertigo is present, there may be spontaneous nystagmus.