Main Page | See live article | Alphabetical index 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. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.