There are many reasons why the left eyelid has been jumping for a week, the specific reasons are as follows: 1, eyelid injury, injured eyelid because of painful stimulation appears eyelid jumping, or there is scar on the eyelid to stimulate the eye appears eyelid jumping, you can apply erythromycin ointment treatment. 2, inside the eye into the foreign body, mosquitoes or dust or eye lashes, stimulate the eye appears eye pain, eyelid jumping, tearing symptoms, you need to drop eye drops to let Foreign bodies flushed out or frequent blinking to let foreign bodies flow out with tears. 3, eye diseases, patients with conjunctivitis, keratitis, blepharitis, will have eye pain, dryness, redness, eyelid jumping symptoms, need to use levofloxacin eye drops, patients with inverted eyelashes because the eyelashes stimulate the muscles around the eyes resulting in eyelid jumping, need to perform surgery. 4, vascular compression, thickening and distortion of blood vessels to compress the nerve, appear symptoms of eyelid jumping.