Muscle twitches fall into two main types. There’s myoclonus, where a whole muscle or group of muscles twitch or spasm. Then ...

Add Yahoo as a preferred source to see more of our stories on Google. Though many people experience muscle twitching, it's often incorrectly identified as a muscle spasm. While both are involuntary ...

While sitting still at your desk or watching TV, you sense a feeling of muscular discomfort in your arm or leg. It’s not quite a charley horse, but you can see your skin pulsating involuntarily, as if ...

Leg twitching is a sudden contraction or release of a muscle. Leg twitching when trying to relax can sometimes be a sign of a health condition, such as restless leg syndrome. When signal misfires ...

You’re sitting at your computer when it starts — that annoying flutter in your eyelid that feels like a tiny butterfly trapped under your skin. Most of the time, eye twitching is harmless and goes ...

slow-twitch muscle fibers, which move more slowly but help to keep you moving longer fast-twitch muscle fibers, which help you move faster, but for shorter periods “Twitch” refers to the contraction, ...