The Cramp reference article from the English Wikipedia on 24-Jul-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Cramp

Cramp is an unpleasant sensation caused by contraction of a muscle.

It can be caused by cold or overexertion. Illness or poisoning can cause cramps, particularly in the stomach, if the cause is an intestinal virus.

Menstruation also is highly likely to cause cramp of varying severity in the abdomen.

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