The most common cause of leg cramps in the elderly is calcium deficiency. It is generally recommended to take calcium carbonate D3 granules and active vitamin D3 preparations, which can replenish the basic calcium content and also facilitate the reabsorption of calcium ions from food in the small intestine area, which can promote the elevation of blood calcium. In addition, you can eat more foods high in calcium, such as soy, milk, dairy products, eggs, and lean meats, such as beef and chicken breast, all of which can supplement calcium elements and prevent the occurrence of low calcium. This is because calcium loss is aggravated in the elderly and is accompanied by a decrease in bone mass and osteoporosis. Calcium ions can inhibit the excitability of the neuromuscular junction. When calcium deficiency is present, the excitability of the neuromuscular junction increases, causing spasmodic pain in the muscles, which is manifested as leg cramps.