Common causes of eyelid twitches include stress, fatigue, eye irritation, lack of sleep and side effects from medications, according to Healthline. In benign essential blepharospasm, in which the eyelid twitching is chronic and may affect both eyes, triggers include eyelid inflammation, dry eyes, conjunctivitis, light sensitivity and pollution.
Eyelid twitches, or blepharospasms, are uncontrolled muscle spasms in the eyelids, explains Healthline. The twitches last about a minute or two every few seconds, occurring on and off for several days. Mild twitches are generally harmless and painless and resolve on their own without treatment. However, in rare cases, eyelid twitches may indicate an underlying brain or nerve disorder.