Is an Eyelid Twitch Dangerous?

QUESTION: There are some times, when for nor reason I can find, my eyelid
begins to twitch. I can put my finger on it, to try to hold it, but that
doesn't stop the twitches. Then as suddenly as it started, it just stops.
Where does this come from and what can I do about it? Is it dangerous? I
know this is some silly little thing, but perhaps you will answer me anyway.
I would be most thankful.
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ANSWER: A twitching eyelid is a form of tic, or tiny uncontrollable movement
of a muscle. A tic is usually caused by an irritation of the nerve that sends
signals to the muscle. Several nerves control the muscles of your face,
including the tiny muscles that make up your eyelid. The twitch could be due
to a minor irritation of the oculomotor nerve (which controls the muscles that
move your eyes) or the facial nerve (which controls the muscles of your face).
If your eyelid twitch ever persists or gets worse, it should be examined
by your physician. A worsening facial tic can be caused by a tumor growth or
a cyst near the nerve. This situation is rather rare, however. In most
cases, the reason for your twitch may never be found. In that case, you may
get some relief by trying a few simple measures. Try applying either hot or
cold compresses on your eye lid or try gently stretching your eyelid, by
gently pulling it either up or down. These simple tricks often put an end to
the tic.
When no cause is found, a twitching eyelid is not dangerous, but it is a
nuisance. Try the simple physical measures I have outlined to get quick help.
If they don't work, you may simply have to wait until it disappears by itself,
and console yourself with the knowledge that you have nothing serious to worry
about.