Calf cramps may be related to calcium deficiency and exertion and cold. When the attack occurs, you should pull the calf of the foot, or even the toe of the side of the cramp upwards, and perform local massage of the cramped area. It is recommended to pay attention to rest, take appropriate calcium tablets and eat more bone soup and carp soup. Drinking more milk is the safest and most effective way to supplement calcium, which is rich in calcium and can be easily digested. Also, you can eat more calcium-rich foods, such as seaweed, nori, tofu, snails, pork liver and beef liver. You can also get more sunlight for the purpose of calcium supplementation.