Left eyelid twitches and feels swollen underneath eye but isn't. sinus issues. eye dr said eyes are perfect. no sinus infection. should i be worried?

Could be Neck: It's good you had sinuses and eyes checked. You may want to have a chiropractor check your upper neck as an irritated brain stem, can over stimulate cranial nerves to face and eyes, causing twitching. This is often seen with those who slept funny, torticollis, and motor vehicle accidents, whiplash.

Myokymia: Random twitching of an eyelid, which is benign, is called myokymia (an involuntary, spontaneous, quivering of a few muscle cell bundles within a muscle). Ocular myokymia, is quite common and self-limited, it can last a few minutes to a few days. It can be caused by stress, dry eyes, fatigue, caffeine, and lack of sleep. Reduce intake of alcohol/tobacco/caffeine, get rest, reduce stress, tx eyes.