头晕的程度轻则可能是短暂昏厥，重则导致无法执行正常功能的严重平衡失调。在 65 岁以上成人中，多达 30% 者出现头晕。
头晕可能感觉像：
- 头重脚轻，好像可能昏倒
- 不稳定或失去平衡
- 您或周围环境正在旋转或移动的错觉（眩晕）
- 漂浮、游动或头重脚轻感
头晕往往是暂时出现，不作治疗就消失。当您与医生谈论您的状况时，设法描述您的具体症状、头晕在正出现时以及已过后让您如何感觉、什么东西触发头晕以及头晕持续多长时间。这将有助于医生诊断病因以及对症治疗。
头晕原因就像其症状那样繁多。它可能起因于某种简单事情比如晕车（您在急弯路上或过山车上出现的恶心感）。或可能由内耳障碍、感染、因动脉阻塞或心脏病导致的血流量减少、药物副作用、焦虑或其他状况引起。有时不能确定原因。
无任何其他症状下自行发生的头晕，尤其是眩晕，一般不太可能是卒中的迹象。
头晕的一些原因包括：
一般而言，如果您出现复发性、突发性、重度或持续性不明原因的头晕或眩晕，请就医。
如果您最新出现重度头晕或眩晕，并伴有以下任何一种情况，请立即就医：
- 突发剧烈头痛
- 胸部疼痛
- 呼吸困难
- 手臂、腿部麻木或麻痹
- 昏厥
- 复视
- 心跳加快或不规则
- 意识模糊或言语不清
- 蹒跚或行走困难
- 持续呕吐
- 癫痫发作
- 听力突然有变化
- 面部麻木或无力
在此期间，这些自我护理方法可能有帮助：
- 缓慢移动。当您从躺着的状态站起身时，动作要慢。许多人在快速站起身时会感到头晕。
- 饮用大量液体。保持充足的水分可以帮助预防或缓解多种类型的头晕。
- 避免咖啡因和烟草。这些物质可能限制血液流动，使症状恶化。
显示参考文献
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Original article: https://www.mayoclinic.org/zh-hans/symptoms/dizziness/basics/causes/sym-20050886