For the heraldic device, see cramp (heraldry); for the band, see The Cramps
Cramps are unpleasant, often painful sensations caused by contraction or over-shortening of muscles. Cramps can be caused by cold, overexertion or low calcium level in blood (especially for adolescents, who need calcium for both blood and bone maturing) though the most common reason is low sodium and potassium levels in blood accompanied by excessive dehydration. Illness ...
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Cramp
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