What causes leg cramps during sleep at night?

Leg cramps during sleep at night may have various causes. Calcium deficiency is one of the common triggers, as calcium ions are essential for maintaining normal muscle function; low calcium levels can increase muscle excitability and lead to cramps. Cold exposure to the legs at night is another frequent cause, as cold stimulation can cause muscles to contract and increase the risk of cramping. In addition, maintaining the same sleeping posture for prolonged periods or putting pressure on the legs may impair blood circulation, thereby triggering cramps. Certain medical conditions, such as varicose veins or neurological disorders, may also contribute to nighttime leg cramps. To prevent nocturnal leg cramps, it is advisable to stay warm, avoid maintaining the same position for long periods, and ensure adequate calcium intake. If symptoms persist, a medical evaluation is recommended.