The main cause of left eyelid jumping is spasm of the orbicularis oculi muscle on the left side, but it may also be caused by inflammation of the muscles that innervate the eye, which should be analyzed on a case-by-case basis and should not be generalized. The eye muscles are innervated by the facial nerve emitted from the brain. If the part of the facial nerve out of the brainstem happens to be located at the intersection of the central and peripheral myelin sheaths, it is easily compressed by blood vessels, triggering eyelid spasm, i.e. eyelid jumping; the usual unreasonable living habits causing prolonged eye overuse or neurological weakness can lead to eyelid jumping; in addition, inflammation of the eye muscles can also lead to eyelid jumping. Patients with eyelid jumping should promptly adjust their lifestyle to avoid excessive eye use, increase sleep time, improve sleep quality, avoid staying up late, and avoid excessive mental stress. In addition, if the eyelid jumping lasts for a long time, it is recommended to visit the ophthalmology department of the hospital in time to clarify the cause and carry out symptomatic treatment, and at the same time, take nerve-nourishing drugs or carry out acupuncture, local massage and other treatments.