Although modern medical science has long confirmed that the common saying “left eye jumping money, right eye jumping disaster” has no scientific basis, but there are still many people (especially in rural areas) because of the eyelid jumping to see a doctor. This shows that the phenomenon of eyelid jumping is widespread, and people are not clear about the causes of eyelid jumping. So why does the left eyelid jump? In medical terms, the eyelid is called the eyelid. There are two muscles in the eyelid: one is called the orbicularis oculi, which is shaped like a wheel and surrounds the eye, and when it contracts the eyelid closes; the other muscle is called the levator aponeurosis, and when it contracts the eye opens. These two muscles are constantly contracting and relaxing so that the eyes can open and close. If the nerves that govern these two muscles are stimulated by some factor, the two muscles become excited at the same time, and there will be repeated contractions, or even spasms or tremors, and the eyelids will involuntarily flutter. When eyelid jumping occurs, most people feel obvious themselves, but the next person can not see it, only individuals can be seen by the next person eyelid jumping. Is left eyelid jumping treated? The left eyelid jumping can be divided into two types: physiological and pathological. ”Physiological” jumping: it is easy to appear when you use your eyes excessively or are tired, over-stressed, stressed, or over-smoking and drinking, and the attack is short (usually a few seconds) and the degree of jumping is not serious. Physiological eyelid jumping does not require treatment Many people experience physiological eyelid jumping, which is transient, with episodes of short duration, often just a few seconds, and the degree of jumping is not serious. This type of eyelid flutter generally does not require special treatment. As long as the eyes are closed and rested for a while, local massage or hot compress, the eyelid jumping will disappear. Pathological” eyelid throbbing: can be caused by refractive error (myopia, hyperopia, astigmatism, etc.), intraocular foreign bodies, inverted eyelashes, conjunctivitis, keratitis, etc., more frequent attacks, long duration, throbbing amplitude, some people will even eyebrows, forehead, corner of the mouth and even half of the face twitching together. In particular, 99% of the eyelid fluttering caused by facial muscle spasms is due to the facial nerve that governs eyelid muscle movements being stimulated by abnormal intracranial vascular compression, and 1% is due to intracranial tumors and arachnoid adhesions stimulating the facial nerve, so it is also considered a sign of intracranial disease. Pathological eyelid jumping needs treatment Some people not only have eyelid jumping, but even the corners of the mouth and half of the face twitch together and feel nauseous and dizzy. This kind of eyelid jumping can only be made to stop when the cause is found and eliminated. The causes include exertion, stress and disease. The more severe pathological eyelid jumping is caused after a facial muscle spasm. This kind of eyelid jump is a sign of intracranial disease, mainly because the facial nerve, which governs the muscle movement of the eyelid, is compressed by blood vessels, resulting in abnormal nerve impulses, and is difficult to heal on its own. Therefore, if you experience prolonged and gradually increasing eyelid jumping, you should go to the hospital promptly.