Lower eyelid twitch intermittently for 5 days, not stressed, tired, on any medication. dont wear glasses or contacts. what else could be causing it?

See Dr. if persists: Twitching of an eyelid, which happens in normal people, is called myokymia (an involuntary, spontaneous, quivering of a few muscle cell bundles within a muscle). Myokymia starts and stops spontaneously. In the eyelids, it can last a few minutes to a few days. One should see an ophthalmologist (md eye doctor) if such symptoms persist, keep recurring, or are combined with any other symptoms.