Sudden deafness is a sudden and instantaneous onset of tinnitus and deafness of unknown cause, with rapid hearing loss reaching a peak within hours or days. The onset of deafness is usually in the evening or in the morning, and half of the people have vertigo, nausea and vomiting in severe cases. The degree of deafness is positively correlated with the severity of vertigo, which can gradually disappear within a week. Etiology: The onset is often preceded by emotional stimuli such as anger, depression and sadness, as well as triggers such as fatigue, alcohol consumption, pregnancy and ambient air pressure temperature. Treatment: In the acute phase (early stage) with severe vertigo, sedative and antiemetic drugs should be used. Drugs that dilate peripheral blood vessels and inhibit platelet agglutination can also be used. Vasodilators Because most of the cases are caused by capillary embolism or spasm, vasodilators should be used in large quantities. Anticoagulant and thrombolytic drugs These drugs are used to reduce clotting and thrombosis and to increase the blood supply to the inner ear. Hyperbaric oxygen therapy Hyperbaric oxygen therapy is used to increase the partial pressure of blood oxygen and increase cellular metabolism. Other neurotrophic drugs such as vitamin B and energy synergists can be used.