Various causes: A muscle twitch(fasciculation) is an small local involuntary contraction of muscle. It is usually not a symptom of a serious illness. Sometimes it occurs after muscular exertion.Tension or anxiety can cause twitching. Magnesium deficiency is another cause. For more information see: http://bit.ly/1rBtxRu If it persists see your physician
Answered 10/30/2015
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