Sudden Sensorineural Hearing Loss in Wonju Severance Christian Hospital

Inclusion Criteria: * Adult patients over 20 years of age * A patient who visited Wonju Severance Christian Hospital, Department of Otolaryngology and was diagnosed with sudden hearing loss as it was confirmed that hearing loss of 30dBHL or more occurred within 3 days at three consecutive frequencies in a pure tone audiometry test. * Those who have fully explained the purpose and content of the study and voluntarily agreed to the written consent Exclusion Criteria: * If the patients do not want to or do not fill out the consent form * If treatment is started for sudden hearing loss, but the possibility of other inner ear diseases including Meniere's disease is suspected due to repeated hearing loss, repeated recovery, dizziness, tinnitus, etc. * Other cases where it is judged difficult to carry out the clinical trial due to the judgment of the person in charge of the above clinical trial