One type of muscle twitch is benign essential blepharospasm. Blepharospasm refers to the muscles of one or both eyelids twitching uncontrollably. This often occurs repeatedly over a sustained period of time. In extreme cases, which are rare, benign essential blepharospasm may also involve the eyebrows, mouth, and neck.
While an eyelid twitch may mimic an eye-blinking tic, it is different because it cannot be controlled. It also occurs most often in adults, rather than in children. Your doctor may be able to determine whether you or your child is experiencing tics or an eyelid twitch based upon the symptoms.
Experts believe that the eyelid twitching of blepharospasm is caused by the misfiring of certain cells in one area of the brain. Eyelid twitches may be aggravated by having dry eyes. They may also be worsened by stress, lack of sleep, caffeine, and harsh light conditions.
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Archived: March 20, 2014
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Read the Original Article: Tic Disorders and Twitches