Myokymia is a fascicular muscle tremor without muscle weakness or atrophy. A number of conditions may be associated with myokymia affecting the eyelid.
Causes of eyelid myokymia:
(1) fatigue and/or lack of sleep
(2) dazzling from bright lights
(3) irritation of cornea and/or conjunctiva
(4) excessive alcohol use
(5) excessive smoking
(6) stress and overwork
(7) trigeminal neuralgia
(8) multiple sclerosis
(9) myasthenia gravis
(10) familial dystonia
(11) familial occurrence
(12) debilitation
(13) associated with spastic paretic facial contracture (with lesion in dorsal pons)
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