If foot cramps occur in the elderly, they are generally considered to be caused by calcium deficiency. The most useful thing to do for relief is to actively supplement calcium, and blood calcium should be tested first. If it is clear that there is a decrease in blood calcium, you can IV calcium gluconate to raise blood calcium. At the same time to high calcium diet, usually eat more milk, eggs, soy products, and lean meat, such as beef, chicken breast, these foods are richer in calcium, can promote the blood calcium. In addition, you can regularly supplement calcium carbonate granules and active vitamin D3 tablets. Elderly people need active anti-osteoporosis treatment to prevent calcium deficiency and fragility fractures. As most of the elderly are suffering from osteoporosis, the amount of bone decreases and the calcium content is often insufficient. Calcium ions can inhibit the excitability of the nerves and muscles, and when there is a lack of calcium, there will be spasms and cramps in the calf muscles.