You're relaxing on the sofa when suddenly your eyelid starts twitching. Or perhaps it's a muscle in your arm, your leg, or ...

Nothing has the ability to freak you out, take your breath away, or completely annoy you quite like a muscle cramp, spasm, or twitch. Honestly, just the thought of one is enough to make your eye, well ...

Medically reviewed by Nicholas R. Metrus, MDMedically reviewed by Nicholas R. Metrus, MD Almost all of us will have experienced a fasciculation at one time or another. A fasciculation is simply a ...