What causes the left eye to jump?

Left eye jump, more common in blepharospasm. Generally mild blepharospasm, more common in long-term close eye use, long-term use of electronic products, fatigue, stay up late, it is recommended to reduce close eye use, reduce the use of electronic products, prevent staying up late, rest more, with artificial tears eye drops can mostly alleviate. For long-term or more serious blepharospasm, can consider botulinum toxin treatment, but botulinum toxin treatment duration is short, generally 3 to 6 months after the need for re-treatment, no treatment may recur.