Sudden deafness, or “idiopathic sudden deafness”, or “sudden deafness” for short, is a sudden, unexplained sensorineural hearing loss. So, what are the clinical manifestations of sudden deafness? The following are the clinical manifestations of sudden deafness: 1. Tinnitus can be the first symptom, most patients can have tinnitus when they are deaf, but tinnitus can also occur after deafness. After treatment, most patients can improve their hearing, but tinnitus can persist for a long time. 2. Vertigo Some patients may have varying degrees of vertigo, mostly rotational vertigo, with nausea and vomiting. It may appear at the same time as deafness or before or after the occurrence of deafness. 3. Deafness Mostly unilateral deafness, without aura before the onset, and a few patients have a history of mild cold, fatigue or emotional excitement. Deafness occurs suddenly, and the patient’s hearing usually drops to the lowest point within minutes or hours, and a few patients may reach the lowest point within 3 days. 4.Other A few patients may have a feeling of stuffy, pressure or numbness in the ear.