Ischemic cerebrovascular disease: Ischemic attacks in the brain may lead to ischemia in the inner ear, which further leads to damage to the auditory nerve and can result in tinnitus, followed by serious conditions such as hearing loss. Sudden deafness: Sudden deafness is a sudden onset of sensory nerve deafness of unknown cause, also known as violent deafness. Its onset is rapid, its progression is fast, and the effectiveness of treatment is directly related to the time of consultation, so it should be considered an otologic emergency. Auditory neuroma: Auditory neuroma is a tumor that originates from the auditory nerve sheath, mostly from the inner ear canal segment of the VIII cerebral nerve, but also from the beginning of the nerve sheath at the mouth of the inner ear canal or from the floor of the inner ear canal. Otitis media: When there is a sudden change in atmospheric pressure, the eustachian tube does not open smoothly to regulate the pressure inside the tympanic cavity, thus causing damage to the tympanic cavity, similar to aseptic otitis media, which is called air pressure injury. Under normal conditions, the eustachian tube opens momentarily during swallowing, yawning and nose blowing.