The muscle twitch creates short, involuntary muscle contractions, which affect tiny muscle areas that lie beneath the skin.

Though many people experience muscle twitching, it's often incorrectly identified as a muscle spasm. While both are involuntary contractions of a muscle, muscle spasms and muscle twitching aren't ...

Tweaked by a muscle twitch? From an uncontrollable fluttering eyelid to a pulsing calf muscle, these small, rapid involuntary muscle contractions may happen at any time — and can be annoying. A common ...

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It seems Chrissy Teigen has developed an unexplained ailment. The model, who is one of the judges on NBC's new comedy show, Bring the Funny, premiering tonight, took to Twitter to explain what exactly ...

It may start as something we’re all familiar with: tiny spasms around your eyelid. “When you’re tired or stressed and you get fluttering under your eye or eyelid and it’s really annoying,” says Sharon ...

The ninth-grader started getting dizzy spells and headaches two weeks ago. Then about a week ago, her right hand started twitching, she said. The twitching seemed to start in her wrist, then move up ...