Doesn't sound seriou: if lasts for only seconds, it is not likley to be serious. it could be a muscle fiber twitching or going into a spasm. this could occur with muscle fatigue, or overstretching certain muscles. perhaps you are doing a particular exercise which is causing this.
Answered 11/28/2017
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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