Sudden deafness, or “idiopathic sudden deafness”, is a sudden onset of sensorineural hearing loss of unknown origin. The main clinical manifestation is unilateral hearing loss, which may be accompanied by tinnitus, ear blockage, vertigo, nausea, vomiting, etc. Sudden deafness is a sudden onset of sensory nerve deafness of unknown cause, the incidence is increasing year by year, spring is the high season, the incidence is high in adults aged 40 to 60 years old, and is more common in men, its onset is rapid and progresses quickly, the treatment effect is directly related to the time of consultation and treatment, so how to choose the best time for treatment? Treatment is best within 3 days of onset. Sudden deafness is an acute condition and the effectiveness of treatment is directly related to the time of consultation, which generally cannot exceed 3 days. If treatment is kept delayed, it can cause serious damage to hearing, and in severe cases, hearing loss may occur within a few days, or even hearing may disappear, resulting in complete deafness. Many patients with sudden deafness go to the hospital for examination, only to find that they are already moderately to severely deaf, or in some cases, completely deaf. At this time, the chance of recovering hearing completely through treatment is only 30%, while the efficiency of treatment can be as high as 80% if the patient goes to the hospital within 3 days of the disease. It is clear that the earlier the sudden deafness is treated, the better the results. Many people miss the best time for treatment and are left with irreversible lifelong deafness.