Sudden hearing loss is one of the most common otologic emergency conditions and sudden sensorinerual hearing loss(SSNHL), noise-induced hearing loss(NIHL), ototoxic hearing loss, acute low-tone hearing loss could be quite commonly encountered diagnosis for sudden hearing loss. Traumatic inner ear injury associated with perilymphatic fistula and labyrinthitis might be less common but should be treated promptly and properly. SSNHL which is a common sudden hearing loss in clinical area still remains a therapeutic dilemma even though treatment with corticosteroids as soon as possible after the onset of hearing loss has been considered as a gold standard with some disputations. Combination of systemic and intra-tympanic injection of steroids has better hearing restoration result. IT-S was useful as either primary therapy or salvage therapy in patients with medical comorbidities. Adjunctive or new therapeutic strategies as well as special considerations in managing SSNHL in children or during pregnancy will be briefly discussed. Management of other less common but clinically important causes of sudden hearing loss will be summarized.