The left lower eyelid jumping may be caused by eyelid muscle spasm, and the common causes of eyelid muscle spasm are as follows: 1, physiological causes: common strain, late night, poor rest, or brain, long time eye use, such as long time watching computer, TV, cell phone; its treatment is mainly to avoid bad habits, avoid long time eye use, avoid strain, late night, poor rest; generally after improving the causes, the left lower eyelid jumping will 2, pathological causes: facial nerve injury area will have inflammation, tumor, according to the specific circumstances of the detailed physical examination, if necessary, you need to do the corresponding auxiliary examination, such as electromyography, or orbital CT, nuclear magnetic can be. The specific condition requires the patient to go to a regular hospital for formal examination and treatment.