See Doctor: Muscles in our body contract and relax consciously and unconsciously. A muscle that involuntarily contracts without our consciously willing it is called a "spasm." if the muscle maintains a sustained "spasm", it becomes a cramp, as can be seen with exercise. Causes: overuse, neck and back problems, posture, fatigue, diminished blood supply, injury, metabolite imbalance and certain diseases.
Answered 8/20/2013
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A doctor has provided 1 answer
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