耳鸣是老年人的常见病,有60%的耳鸣患者临床医生可以找到病因,归纳为以下原因:一是耳毒性药物原因,许多药物可引起耳鸣,如抗惊厥药、麻醉性镇痛药、抗癌药物、抗生素与抗寄生虫药物等。二是噪声原因,一般来说超过安全噪声标准(85～90分贝)强度的噪声都有可能造成耳鸣及耳聋。三是外耳与中耳疾病的原因,外耳异物(耵聍)等触及鼓膜时可引起耳鸣;中耳的 Tinnitus is a common disease in the elderly. There are 60% of tinnitus patients can find the cause of the disease, which can be summarized as the following reasons: First, ototoxic drugs, many drugs can cause tinnitus, such as anticonvulsants, narcotic analgesics, anti-inflammatory Cancer drugs, antibiotics and anti-parasitic drugs. Second, the noise causes, in general, more than the safety noise standard (85 ~ 90 dB) intensity of noise may cause tinnitus and deafness. Third, the reasons for the outer ear and middle ear disease, outer ear foreign body (耵 聍) and other tympanic membrane can cause tinnitus; the middle ear