Black hand one: pressure Damage site: inner ear Pressure is likely to lead to sudden deafness, is a kind of neurological deafness, most of the sudden one side of the ear can not hear, may be accompanied by tinnitus, ear stuffy feeling at the same time. A found sudden deafness, to catch the treatment, the general onset of the day of treatment is the best, within a week to start treatment, about 80% of the patients can be cured or partially recovered, the longer the time after the onset of the treatment effect is worse. Black hand two: otitis media Damage site: middle ear, inner ear Repeated attacks of otitis media can directly lead to hearing loss, through early treatment, most people can avoid the further development of hearing loss. Black hand three: age Damage site: middle ear, inner ear, mainly inner ear lesions. When a person reaches old age, the function of all organs of the muscle will decline, and so will the hearing organ, which will gradually age with age. Around the age of 60, about 30% of people will have difficulty hearing high-frequency sharp and thin sounds, and around the age of 80, 50-70% of the elderly have high-frequency hearing loss. In addition, the elderly are prone to diseases such as arteriosclerosis, hypertension, diabetes, and hyperlipidemia, which indirectly lead to lesions of the inner ear and ear nerves. We can delay the time of hearing loss by treating these diseases and reducing factors that may accelerate hearing loss such as noise. Hacker 4: Noise Injury: Inner ear In the past, industrial noise was the main cause of hearing loss, but nowadays, due to the invention of the Walkman, the culprit of hearing loss has changed to music. Prolonged, loud music damages our hearing by damaging hair cells, auditory nerve fibers, auditory neurons and microvascular spasms in the inner ear. Sound damage to the sense of hearing is mainly divided into two categories: one is a sudden huge sound, such as firecrackers; the other is chronic noise, long time in high noise work, hearing unknowingly harmed. Black hand five: drugs Damage site: inner ear, drugs damage the fine structure of the inner ear. Liu Shengli deputy director told reporters that there are ototoxic drugs clinically about 90 kinds, although doctors and parents have paid attention to the problem over the years, but drug deafness is still the first common cause of acquired deafness, about 30,000 people each year due to improper use of drugs occurring hearing loss, pediatrics are common, adults also occur. The most common are aminoglycoside antibiotics, other anti-tumor drugs, diuretics, anti-inflammatory painkillers. Black hand six: trauma Damage site: middle ear We have heard such things, someone a slap down the child deaf. Why? The ear canal is very thin, slapping this action driven by high air pressure directly on the tympanic membrane, vibration of the tympanic membrane, may damage the tympanic membrane as well as the auditory ossicles chain, resulting in deafness. Black hand seven: heredity Damage site: auditory nerve 50% of deafness is hereditary, there is a genetic basis. Some children are born able to hear and later lose their hearing.