是什么让这些眉毛抽搐?

无法控制的眉毛抽搐不仅是随机的，而且很尴尬。第一次约会或是面试都不好玩。镁的缺乏也可能是由于睡眠不足，甚至是睡眠不足引起的。

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Whether it's around the eyebrow, lips, forehead or eyelids, "in adults, a facial spasm rarely indicates an underlying medical condition," saysAli Samii，医学博士,a neurologist at University of Washington Medicine who specializes in movement disorders and spasticity. Instead, a twitch usually resolves on its own and people forget they ever had one." Eyebrow twitching often happens along with eyelid twitching because an eyelid twitch can pull the eyebrow down.

Normally, nerve impulses from the brain tell muscles what to do, but according to the俄亥俄州立大学韦克斯纳医学中心疾病或压力会破坏这一过程，导致肌肉抽搐。

眼睑抽搐是什么征兆？根据美国眼科学会，眼睑抽搐可能是由于睡眠不足、压力过大或too much caffeine. 凯洛格眼科中心密歇根医学有一个类似的信息：“眼科医生经常被问到是什么导致抽搐，以及怎样才能停止抽搐。睡眠不足、咖啡因过多或压力增加似乎是根本原因。”

这个Mayo Clinic列出其他可能的诱因，包括强光、吸烟、药物、酒精和空气污染。

这个National Institutes of Health Office of Dietary Supplements说明镁是一种参与新陈代谢、蛋白质合成和血压的矿物质。有了健康的饮食，你就可以从你所吃的食物中获得足够的矿物质，所以镁补充剂通常是不必要的。

菠菜和其他green leafy vegetables,nuts, seeds and whole grains are good sources, notes theU.S. Department of Agriculture.Black beans and kidney beans, edamame, avocado, baked potatoes, rice, unprocessed cereals, raisins, yogurt, oatmeal, salmon, halibut, milk, chicken and beef also contain magnesium.

Chronic alcoholism can cause magnesium deficiency, according to theCleveland Clinic.

低镁水平可导致骨骼肌抽搐和节律异常heart rate," saysMatthew C. Kostek, PhD匹兹堡杜克斯内大学物理治疗副教授。

"If a person is experiencing lip or forehead twitches, they most likely notice them because they are on the face and are thus noticeably observed visually, and also felt more easily due to increased sensory input of nerves from the face, compared with other parts of the body," he says. Twitches on the heel, elbow or any place that's covered by hair might go unnoticed.

Kostek博士说：“支配面部肌肉的神经元密度比身体其他区域稍大，所以症状可能首先出现在那里，然后在那里首先被注意到。”。

《华尔街日报》2017年8月的评论Nutrients建议服用镁补充剂可以缓解运动后的酸痛。但证据很少，因为镁含量很难检测出来。典型的血液、唾液或尿液测试不如测量其他健康因素有用。因此，很难确认过度用力会导致镁消耗，因为消耗很难测量。

"According to previous research, the best indicator of magnesium status in an individual is through the magnesium load test," says阿丽萨姆雷诺，理学硕士他是阿拉巴马大学亨茨维尔分校运动学的临床导师然而，这项测试费用昂贵，而且大多数实验室没有能力进行这项测试，因此经常使用血清镁（一种血液测试），但血液中只占人体总镁的一小部分。

里诺说：“已经有多项研究表明，镁可以减轻缺乏镁的人的肌肉痉挛。”然而，magnesium deficiency是通过血清镁（血液测试）或饮食回忆来评估的美国运动医学院conference that suggested, albeit with just 22 subjects, that magnesium supplementation may benefit people starting an exercise regimen as well as active exercisers who experience chronic muscle soreness.

"In our recent study," Reno says, "magnesium supplementation of 350 milligrams a day for 10 days significantly reduced feelings of muscle soreness and improved feelings of perceived recovery [from exercise] in individuals with low magnesium intake — about 52 percent of the U.S. Department of Agriculture's Recommended Dietary Allowances."

“镁如何减轻肌肉酸痛的机制还不清楚，”她说，“这方面还需要更多的研究。”

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