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Causes of Tinnitus耳鸣的原因

The most common cause of tinnitus is damage to the hearing nerves in the ear (cochlea or inner ear).  We hear things through a stream of nerve impulses going from the cochlea to the auditory system in the brain.最常见的原因耳鸣是损害听证会神经在耳（耳蜗或内耳） 。我们所听到的东西，通过流神经冲动的去从，以耳蜗听觉系统在大脑中。 If the tiny nerves in the ear are damaged or destroyed, this produces an abnormal stream of impulses, which the brain interprets as a sound.如果细小的神经在耳，是破坏或摧毁，这会产生一种不正常的流冲动，而脑解释，作为一个健全的。 This causes the noise associated with tinnitus.这将导致噪音的相关性耳鸣。

Tinnitus in older people is usually caused by natural hearing loss (presbyacusis), which lessens the sensitivity of hearing nerves.  In younger people it is most often caused by damage to hearing as a result of excessive noise.耳鸣在老年人身上，通常所造成的自然性听力损失（ presbyacusis ） ，其中减少的敏感性，听力神经，在年轻的人，这是最常造成的损害听证会，由于过量的噪音。

However, there are a number of other causes of tinnitus.不过，有一些其他原因造成的耳鸣。 It is not always possible to identify the exact cause even after examination by a specialist.这是不总是能够找出确切原因，甚至考试后，由一个专家。

Other common causes include:其他常见的原因包括：

  • excessive wax in the ear causing it to become blocked;过多的蜡在耳，造成它成为封锁;
  • middle ear infection (otitis media) or glue ear (serous otitis media);中耳感染（中耳炎）或胶耳（浆液性中耳炎） ;
  • otosclerosis (stiffening of the tiny bones which transmit sound from the eardrum to the sound-detecting organ, the cochlea);耳硬化症（僵硬小小的骨头发送声音从鼓膜向健全的检测机构，耳蜗） ;
  • Ménière's disease (a condition causing problems with balance) mã © niã ¨再保险公司的疾病（一条件造成的问题，与平衡）
  • anaemia (in which the thinner blood circulates so rapidly it produces sound); and贫血（在该案中更薄的血液循环，如此迅速地产生的声音） ;
  • pierced eardrum.鼓膜穿孔。

Less commonly, tinnitus may also develop as a result of:较少，耳鸣也可能发展成为一个原因造成的：

  • exposure to sudden or very loud noise (eg gunfire, explosion);暴露在突如其来的或非常响亮的噪音（如枪声，爆炸） ;
  • a head injury; 1颅脑损伤;
  • impacted wisdom teeth (when wisdom teeth haven’t completely moved into the normal position);影响智齿（智齿havenâ € ™吨完全搬进正常位置） ;
  • adverse reactions to certain drugs such as antibiotics, diuretics, aminoglycosides, quinine and aspirin, (this is more likely when the dosage is exceeded), and also allergic reactions;不良反应的某些药物如抗生素，利尿剂，氨基糖苷类，奎宁，阿司匹林， （这是更可能时，剂量是超过） ，也过敏反应;
  • solvent abuse, alcohol abuse and other drug abuse;溶剂滥用，酗酒和其他药物滥用;
  • high blood pressure and narrowing of the arteries (atherosclerosis); and血压高的压力和缩小动脉（动脉粥样硬化） ;
  • overactive thyroid gland.过度甲状腺。

Tinnitus is rarely a symptom of a more serious problem but there can be other causes such as tumours, spasm, and abnormal blood flow.耳鸣是很少的一个症状更严重的问题，但可以有其他原因，如肿瘤，痉挛，异常的血流量。

Some people relate their tinnitus to stressful events in their life, such as bereavement.有些人与他们的耳鸣，以压力的事件在他们的生活，如亲属丧亡之痛。