Eye twitches, known medically as myokymia, are seemingly random spasms of the eyelid muscles. Though they usually occur in the upper lid, the lower lid may twitch as well. Most of the time, these twitches are mild and eventually resolve themselves, though in rare cases, they can become chronic or more severe, indicating a serious underlying issue. Most spasms have straightforward causes, are painless, and are more annoying than harmful.
One of the most common causes of eyelid twitching is stress. Certain situations trigger the release of stress hormones that produce a range of physiological effects. They can make the heart beat faster or quicken breathing. Muscles throughout the body become tense, which can result in spasms in the eyelid. The best way to prevent stress from causing twitches is to eliminate the stressful event or take up stress-reducing activities. Eye strain from staring at a computer screen too long is another type of stress that can trigger myokymia.
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