Muscle cramps

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Information about signs, symptoms, causes, treatment and prevention of muscle cramps.

Key points

  • A muscle cramp is when a muscle in the body tenses or stiffens up.
  • The cramps are sharp, sudden and involuntary.
  • Most muscle cramps are not an emergency. Simple stretching and massage can help.
  • To prevent muscle cramps, stretch before bed, drink lots of liquids and avoid exercising too hard when it is hot outside.
Last updated: December 14th 2010