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Woman's World on MSNPainful Muscle Spasms? Here's What Causes Them and How To Find ReliefMany of us have felt a muscle in some part of our body suddenly and involuntarily tighten, causing a twitch or even severe ...
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Causes of Muscle TwitchingSome people experience muscle twitching all over the body everyday ... Muscle twitching occurs when nerves misfire, causing groups of muscle fibers to contract uncontrollably.
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