Leg cramps during sleep are extremely common, especially among older adults, pregnant women, and people who spend long hours standing or sitting. These cramps often appear suddenly, causing sharp pain in the calves, feet, or thighs that may last from a few seconds to several minutes.
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Doctors explain that muscle cramps usually occur when muscles tighten involuntarily. In many cases, simple causes such as dehydration, fatigue, or low levels of minerals like magnesium and potassium may trigger the problem. People who do not drink enough water during the day may be more vulnerable, especially in hot weather.