人为什么或跳眼皮（双语）

  Eye spasm is characterized by the spontaneous contractions of muscle without muscular atrophy or weakness.
  眼皮跳动是一种自发的肌肉收缩，不伴有肌肉萎缩或肌肉无力。
  You might have experienced an involuntary muscle spasm in your knee or elbow.The same can happen to the orbicular is oculi muscle(the muscle in the face that closes the eyelids).
  你可能经历过膝盖或者肘部的肌肉无意识抽搐。同样的情况也会发生在眼轮匝肌（眼睑附近的肌肉）上。
  Eye spams are typically unilateral,occurring in one of the lower eyelids.Sometimes,both eyelids may be involved but the fascicular contractions of each eyelid is independent of each other.The transient and intermittent twitching is semi-rhythmic at a rate of 3-8 Hz.
  眼皮抽搐通常出现在某一边的下眼睑上。有时候可能会涉及两边的眼睑，不过两边眼睑的肌肉收缩彼此独立。这种短暂且间歇性抽搐的频率在3-8赫兹。
  In the majority of cases,eyelid spasms are no cause for concern.These are usually self-limiting and benign,so medical intervention is typically unnecessary.
  在大部分情况下，眼皮抽搐没什么好担心的。它们通常是一种自我限制的良性问题，没必要去医院检查。
  Very rarely,eyelid myokymia may occur as a precursor of hemi facial spasm,blepharospasm,Meige syndrome,spastic-paretic facial contracture,and multiple sclerosis.
  但在很罕见的情况下，肌纤维颤搐可能是面肌痉挛、眼睑痉挛、麦杰综合征、痉挛性麻痹面部抽搐以及多发性硬化的前兆。
  1.Stress 压力
  This is the number-one reason for a twitching eye,according to ophthalmologists.When we're under a lot of pressure,the body releases stress hormones(cortisol)which triggers a"fight or flight"response.
  眼科医师表示，压力是引起眼皮跳的最主要因素。当我们感受到很大压力时，身体会释放压力荷尔蒙，引发“战或逃”反应。
  One immediate consequence is muscle arousal,which may affect eyelid muscles as well.This may be a good time to see your friends,unwind,or meditate in order to reduce the stress that might be causing the twitching eye.
  该反应最直接的结果是肌肉被唤醒，从而可能影响眼睑肌肉。对于你而言，这是一个探望朋友、放松或者冥想以减轻压力的好时机。
  2.Fatigue 疲劳
  Not getting enough sleep or working too much overtime may cause your eye to complain.Scientists aren't sure why,but they've found that getting more rest will make the symptoms subside.
  得不到足够睡眠或者加班过多可能会使你的眼睛“抱怨”。科学家们并不确定其中的原因为何，但他们发现多休息能减轻症状。
  3.Dry eyes 眼干涩
  More and more people work office jobs that involve a lot of sitting and staring at a computer screen.This sort of lifestyle can lead to dry eye syndrome(DES),also known askerato conjunctivitis sicca(KCS).
  越来越多的人在办公室里*，需要长时间坐着并盯着电脑屏幕。这种生活方式会导致干眼症，也叫作干燥性角膜结膜炎。
  Dry eye syndrome is caused by a chronic lack of sufficient lubrication and moisture on the surface of the eye.When our eyes are too dry,they might involuntarily start twitching to keep them moisturized.This repeated blinking can trick the brain into making one or both eyes twitch even more.
  干眼症由眼睛表面长期缺乏润滑和滋润导致。当我们的眼睛太干燥时，它们也许会通过自发的眼皮跳动来保持湿润。眼睛不停眨会影响大脑，让一只或者两只眼睛的眼皮跳动更频繁。
  To avoid DES,use eye drops if you use the computer for more than seven hours a day and make sure to look away from the screen at least once every 20 minutes.
  为了避免干眼症，如果你每天用电脑的时间超过七小时，那么你可以使用滴眼液，并确保自己每隔二十分钟让眼睛至少休息一次。
  4.Caffeine and alcohol 咖啡因和酒精
  Caffeine and alcohol have seemingly polar effects on the body.One is a stimulant while the other is an inhibitor--but both can bring a twitching eye when used in excess.
  咖啡因和酒精对身体似乎有两极性影响。一种是兴奋作用而另外一种是抑制作用，而它们在饮用过量的时候都会导致眼皮乱跳。
  It's important to stay hydrated and to avoid real or artificial sugars when this happens.
  这时你需要补水并避免食用天然糖或者人造糖。
  5.Mineral deficiencies 缺乏矿物质
  A jumping eye might be triggered by magnesium deficiency.If the twitch persists,it's a good idea to get your magnesium levels checked with a simple blood test.
  眼皮乱跳可能由缺镁导致。如果眼皮一直乱跳，那么你可以通过简单的血液测试来检查体内的镁含量。
  If you really are magnesium deficient,you should focus on eating more foods like almonds,oatmeal,or spinach.You can also take magnesium supplements to meet daily Mg needs.
  如果真的缺镁，就要多吃杏仁、燕麦片和菠菜，还可以服用镁补充剂来满足日常镁需求。
  6.Eyelid infection 眼睑感染
  Blepharitis occurs when bacteria infect your eyelids,causing inflammation and redness.This makes the muscles around the eye twitchy.Other symptoms include burning or stinging eyes,dandruff at the base of the eye,and grittiness.
  眼睑有细菌感染时，就会患上睑缘炎，它会导致眼睛发炎和红肿。这会导致眼睛周围的肌肉颤动。其他症状还*括眼睛灼痛、剧痛，眼睛底部出现皮屑和异物感。
  The treatment of blepharitis should begin with a visit with your eye doctor to determine the cause of your sore,red,itchy eyelids.Eyelid hygiene is very helpful to treat and control blepharitis,and a good place to begin is applying a wet clean warm compress to melt any blocked residue around the eyelid.Repeat this several times a day.
  这时你应该去看眼科医生，了解眼睑肿痛发痒的病因。保持眼睑卫生有助于治疗和控制睑缘炎，可以用干净的热敷布来按压眼睛，融化眼睑里残留的阻塞物，一天重复几次。