Left eye eyebrow jump may be too tired or muscle tremor and eye and facial muscle spasm and so on. 1. Over fatigue: If you work under pressure, often stay up late, do not get enough sleep, over fatigue, etc., it is easy to make the eye muscle spasm, so there will be left eye eyebrow jumping; 2. Muscle tremor: if mental stress, anxiety, or excessive use of the eyes, etc., may lead to muscle tremor, so there will be the phenomenon of left eyebrow jumping. In addition, if the eyes are exposed to bright light or stimulated by medicines, it may also lead to left eyebrow jumping; 3. Eye and facial muscle spasms: If the nerves of the eye and the facial nerves are compressed, resulting in eye and facial muscle spasms, there may also be left eye brow throbbing. Left eye eyebrow jumping is recommended to actively go to the regular hospital, clear specific causes, follow the doctor’s instructions to use the appropriate solutions, usually do not overuse of the eyes, but also to ensure that you get enough sleep, can not stay up all night.