The twitching is in the whole left side of his face, eyelid, upper lip, cheek, ear. I have done alot of research and found a few things it could be like Blepharospasm caused by a drug side effect but would like professional help. My father also went to the hospital ER June of last year before the twitches got real bad for numbness on and off all day on the left side, they ran multiple tests for strokes and found nothing. It has to be something. It all stated after the side effect after taking the Chantix and couldnt even walk or drive he shook so bad. He stopped taking the Chantix immediately but the twitching came on a lttle at a time and now it is constant and noticeable.