Allergies, eye strain, tiredness and stress are possible causes of eye twitching. Most sudden-onset eyelid twitching is benign, according to AllAboutVision.com. However, there are rare cases in which eyelid twitching is a symptom of a more serious brain or nervous disorder, notes Mayo Clinic.
Eyelid twitching is the involuntary contraction of the muscles of the eyelid. Seasonal or chronic allergies can cause eyelid twitching, as well as eye strain due to computer overuse or vision problems, explains AllAboutVision.com. General fatigue and stress can also cause the eyelids to twitch.
There are rare instances in which eye twitching is a symptom of a more serious neurological condition, such as Bell's Palsy, dystonia and multiple sclerosis. This is especially possible when eye twitching accompanies other signs and symptoms, such as facial spasms, reports Mayo Clinic.