Leg cramps in the elderly are not necessarily a lack of calcium, but the elderly are of the opinion that leg cramps are a lack of calcium, take calcium tablets legs or cramps, it means that the judgment is wrong. Many people in old age, there is insufficient blood supply, has been repeatedly stressed this problem, insufficient blood supply, blood flow is too slow resulting in relatively insufficient local blood supply, easy to appear cold, numb, swelling, pain, serious can appear cramps. Cramps are most likely to occur in winter, when body cold combined with external cold makes leg cramps more likely to occur. Leg cramps in the elderly can also occur in pathological states, such as hypokalemia, especially in hot days, when there is more sweating and relatively less eating, so hypokalemia occurs, leading to leg cramps, which is a systemic disease. Leg cramps can also be a local problem in the lower extremities, lower extremity arterial plaque, which directly leads to insufficient blood supply to the lower extremities. Severe lower extremity arteries can be occluded, i.e. lower extremity arterial occlusive disease is more likely to have leg cramps and cold legs, which cannot be relieved by any treatment, because the whole blood vessel has been blocked and will definitely be cold, painful, or crampy.