Uncommon
Skeletal muscle cramp
Pathological, often painful, involuntary muscle contraction
Skeletal muscle cramp
A cramp is a sudden, involuntary, painful contraction of one or more skeletal muscles, or an overshortening of such associated with electrical activity. While generally temporary and non-damaging, they can cause significant pain and a paralysis-like immobility of the affected muscle. A cramp usually goes away on its own over several seconds or (sometimes) minutes. Cramps are common and tend to occur at rest, usually at night (nocturnal leg cramps). They are also often associated with pregnancy, physical exercise or overexertion, and age (common in older adults); in such cases, cramps are called idiopathic because there is no underlying pathology. In addition to those benign conditions, cramps are also associated with many pathological conditions. The definition of a cramp is narrower than that of a muscle spasm: spasms include any involuntary abnormal muscle contractions, while cramps are sustained and painful. True cramps can be distinguished from other cramp-like conditions. Cramps are...
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