Introduction: Sudden hearing loss is defined as hearing loss rapid onset, occurring within 72 hours, in one or both ears, with a sensorineural nature. In audiometry, there is a loss of 30 dB in three consecutive frequencies. The incidence of sudden sensorineural hearing loss is 5 to 20 people per 100,000 in population. The etiology is identified in 10 to 15% of patients. Bilateral deafness is rare and should point to certain specific causes.