耳鸣是听觉功能紊乱而出现的一种症状，是人听觉器官对声响或虚构声音的幻觉，比如有些人感觉右耳朵嗡嗡响、蝉鸣，或有似铃响、虫鸣、鸟叫、流水、刮风的声音等。耳鸣有持续性，也有间断性。
\n造成右耳朵嗡嗡响等各种耳鸣的原因很复杂，如肝火上扰，心火旺盛，痰气郁结，邪毒入侵等。从现代医学角度分析，有些耳鸣可能是某种疾病的先兆，如注射链霉素后发生耳鸣；高血压患者耳鸣或原有耳鸣加重，常提示血压升高；久服奎宁、水杨酸等药物也会导致耳鸣；鼓膜内陷、混浊、粘连、穿孔，鼓室积脓，鼻咽部肿瘤等都会发生耳鸣。所以，一旦出现耳鸣症状，应去正规医院的耳鼻喉专科做详细检查与治疗，以免延误病情。
\n在接受正规治疗的基础上，通过调整平时生活和饮食习惯，也能预防和减少耳鸣的发生。
\n避免噪声污染：突然的巨大声响和长时间的噪声接触，均能导致听力下降和耳鸣产生。高危人群（工作在高强度噪声环境中）尤其要注意噪声防护，如佩戴防护耳罩、耳塞等。
\n避免精神紧张和疲劳：长期处于精神高度紧张或身体疲劳状态时，均易使耳鸣加重。因此，适当调整工作节奏，放松情绪，都是有益的。
\n合理用药：耳鸣患者由于其他疾病就诊时，不要忘记告诉医师自己患有耳鸣。因为有些药物会使你已有的耳鸣症状加剧。
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27岁的赵先生2年前出现右侧耳鸣，开始并未予以重视，不久前接电话时突然发现右侧听力下降。这才引起重视，想知道单侧耳鸣的原因，后来经头颅磁共振检查，结果显示为右侧巨大听神经瘤，必须手术治疗。
\n赵先生最后选择接受了巨大听神经瘤的手术治疗。通过耳鼻喉科的显微技术，采用耳后斜切口，历时6个小时，终于切除了肿瘤，完整保留了面神经和脑干功能。由于治疗及时，没有遗留任何神经功能障碍，临床效果良好。那么什么是听神经瘤呢？
\n听神经瘤属于颅内一种十分常见的良性肿瘤。由于肿瘤发生部位特殊，周围结构复杂，肿瘤向上生长可影响三叉神经，导致面部麻木或疼痛；向下生长压迫面神经，可引起面瘫、味觉改变；向内侧生长直接压迫生命中枢脑干；向后生长影响小脑，导致行走不稳等一系列症状。此病如能早期发现，完全可以治愈，但若延误病情，肿瘤巨大时手术风险极大。那么，如何才能做到早期发现呢？
\n听神经瘤出现的早期症状就是耳鸣，特别是初发的单侧耳鸣，一定要高度重视。一定要尽早到耳鼻喉科就诊，通过简单的脑干诱发电位，配合影像学检查即可明确或排除听神经瘤。只有当听神经瘤增大到一定程度，才会出现听力下降甚至丧失。
\n面神经与听神经在颅内以同样方式走行，关系极为密切。听神经瘤在生长或手术过程中极易破坏面神经，导致面瘫，临床表现为眼睛不能闭合，口角歪斜，流口水，十分影响形象，因此，行听神经瘤手术时注意保护面神经目前已成为医学的焦点问题。
\n听神经瘤如能早期发现，面神经此时仅仅受到肿瘤推移，手术分离较为容易，行手术时面神经保护的成功率较高。而当肿瘤生长巨大时，肿瘤长期的压迫已导致面神经严重变形，局部粘连，难以分离，切除肿瘤会相当困难，此时的面神经保护更是一项医学难题。
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