My son's eye twitches on its own and it has been happening for some time now, should i be concerned about it and what may be causing it??

Eye fatigue, muscular weakness or an opthalmologic condition should be considered. The AAP recommends a vision screening test. This is a good starting point for the evaluation.

Pattern eye or facial movements can be part of a transient or long term tic disorder. I would have your kids doc evaluate the issue. Some fade on their own within 6 months while others can evolve into more prominent and long term problems. A cause may or may not be evident after evaluation.