Hearing Loss, Sudden

This study is to build a cohort of sudden sensorineural hearing loss (SSNHL) patients. When the patient visited the Department of otolaryngology clinic for hearing loss, we can diagnose the SSNHL following the result of pure tone audiometry and the history of the patient. The cohort is a system that tracks the hearing recovery status, timing, and degree of recovery of patients who received cocktail therapy with or without high-dose steroids, vasodilators, antiviral agents, and intratympanic steroid injections, satellite ganglion block, and hyperbaric oxygen therapy.

The goal of this observational study is to describe the multi-omics characteristics and to learn about the prognostic factors in patients with idiopathic sudden sensorineural hearing loss (SSNHL). The main problems it aims to deal with are: * if there is a difference in data of exome and targeted sequencing among patients with SSNHL affecting bilateral and unilateral sides, and healthy controls * if there is a difference in the parameter of MRI among patients with SSNHL affecting bilateral and unilateral sides, and healthy controls * to find out which factor from multi-omics data relates to outcomes of SSNHL * to develop the best prognostics model based on the multi-omics data. Participants will be received audiological tests, blood specimen collection and radiological examination. Researchers will explore the relationship between the multi-omics data and the prognosis and develop the predictive model.