Boys left eye has been jumping generally refers to eyelid jumping, also known as blepharospasm, which is mostly eye fatigue, excessive tension and other physiological reasons, but also may be keratitis, conjunctivitis and other diseases. 1. Physiological reasons: such as patients with long hours of eye fatigue, late at night, excessive tension, bright light stimulation, etc., can cause spasmodic contraction of the orbicularis oculi muscle, which can lead to eyelid fluttering. 2. Keratitis: Keratitis refers to the inflammatory disease that occurs in the corneal tissue, and the main manifestations of the patient are eye pain, photophobia, tearing, eyelid spasm, periocular congestion, etc., which can also cause the patient’s eyelid fluttering. 3. Conjunctivitis: Conjunctivitis refers to the inflammation of the conjunctival tissue, the patient’s main manifestations of photophobia, tearing, eye foreign body sensation, burning sensation, increased secretion and other symptoms, but also can cause eyelid spasm, which can lead to eyelid fluttering. It is recommended that patients with frequent fluttering of the eyelids should consult a doctor to evaluate their condition and follow the doctor’s instructions for treatment.