My eye lid is twitching.
I can remember when I thought an eye lid twitch was the symptom of a serious illness. It probably is if your eye lid twitches constantly, but a few random twitches are just annoying.
The great Google machines says eye lid twitches can be caused by stress, eye strain, tiredness, caffeine, alcohol, dry eyes, nutritional imbalances and allergies.
Geez…I probably have six of the eight. I’m surprised my eye lid doesn’t twitch all the time!
(I’ll leave it up to you to guess the two I don’t have.)