Injection behind the ear is a more effective adjunctive treatment for sudden deafness, usually 40mg of sodium methylprednisolone succinate injection, once every other day, behind the ear, usually three times. The main cause of sudden deafness is hearing loss caused by spasm of the auditory artery and insufficient blood supply in the inner ear due to anxiety, fire and lack of sleep, followed by edema of the auditory nerve and water retention and edema in the vagus of the cochlear membrane. In the treatment of this disease, the main focus is to improve the blood supply and reduce the water retention and edema in the inner ear auditory nerve and cochlear area. Glucocorticoid injections behind the ear can effectively relieve the symptoms of edema and fluid accumulation at the inner ear. Along with the postauricular injection of methylprednisolone, intravenous injection of drugs to improve blood supply and nerve nutrition in the inner ear is required.