What causes leg cramps during sleep?

Possible causes of leg cramps during sleep may include the following: 1. Calcium deficiency: Low calcium levels are a common cause of nocturnal leg cramps. Calcium ions are essential for maintaining normal muscle function. A deficiency can reduce blood calcium levels, making muscle spasms more likely. 2. Overexertion: Excessive physical activity or walking during the day may overwork leg muscles and ligaments, leading to fatigue-related inflammation that can trigger leg cramps at night. 3. Localized cold exposure: Inadequate warmth during sleep may impair local blood circulation and slow blood flow, potentially causing leg cramps. 4. Improper sleeping posture: Prolonged side sleeping can compress one foot, disrupting local blood circulation and possibly resulting in leg cramps.