Sudden deafness has little chance to be cured. The emergence of sudden deafness is recommended to be treated actively, and the treatment effect is divided into the following three categories: 1. Effective: hearing improvement of 15db or more; 2. Significant: hearing improvement of 30db or more; 3. Cure: return to the level before the onset or normal. The effectiveness is divided into the following three categories by basic hearing: 1. low frequency mild deafness, up to 70%-80% or cured; 2. moderate to severe deafness, up to 50%-60%; 3. severe to very severe deafness, which can be improved or effective, with low chance of cure.