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- This article is about muscular pain. For the band, see the Cramps. For the tool, see Clamp (tool)
Cramps are unpleasant sensations caused by contraction, usually of muscles. It can be caused by cold or overexertion. Illness or poisoning can also cause cramps, particularly in the stomach, which is referred to as colic if it fits particular characteristics.
Causes and treatment
There are two basic causes of cramping. One is inadequate oxygenation of muscle, and the other is lack of water or salt. Cramps from poor oxygenation can be improved by rapid deep breathing, as well as stretching the muscle. Cramps from lack of salt and water can be treated by stretching the muscle, and of course drinking water and increasing salt intake. Pounding on the muscle can increase soreness.
Muscle cramps in particular can be treated by applying a soft massage on the cramped muscle, stretching the muscle and applying heat or cold. Heat improves superficial blood circulation and makes muscles more flexible, so some people find that heat is more soothing for muscle cramps than applying ice.
Electrolyte disturbance may cause cramping and tetany of muscles, particularly hypokalemia (a lack of potassium) and hypocalcemia (a lack of calcium).
Menstruation
Menstruation also is highly likely to cause cramps of varying severity in the abdomen. Most of this is attributable to the passing of coagulated blood through the cervix. Menstrual cramps can be treated with ibuprofen, stretching exercises or the application of heat through such means as warm baths or heating pads. Menstrual cramps that do not respond to self-treatment can be a symptom of endometriosis or other health problems. A woman experiencing severe cramps should consult a gynecologist.
Nocturnal leg cramps
Nocturnal leg cramps are involuntary muscle contractions that occur in the calves, soles of the feet or other muscles in the body during the night or (less commonly) while resting. The duration of nocturnal leg cramps is highly variable with cramps sometimes only lasting a few seconds and other times several minutes. Soreness in the muscles may remain for some time after the cramp ends. These cramps are more common in older populations but may happen to anyone.
The precise cause of these cramps is unclear. Potential contributing factors are believed to include low levels of certain minerals (magnesium, potassium, calcium and sodium), dehydration and prolonged sitting. Less common causes include more serious conditions or use of drugs.
An unrelated condition is restless legs syndrome, an unpleasant sensation that is relieved by moving the leg, but which rarely includes cramping or pain.
Smooth muscle
Smooth muscle contractions lie at the heart of the cramping (or colicky) pain of internal organs. These include the intestine, uterus, ureter (in kidney stone pain) and various others.
Skeletal muscle
References
"Cramp"