Cramps occur when the calf area is strained, usually due to excessive cold in daily life, calcium deficiency in the body is more serious, so that the leg cramps occur during the process of force. In daily life, try to supplement food with high calcium content, appropriate calcium supplements, vitamin D, with more sunshine, can promote calcium absorption. Another condition cannot be ruled out is the recent high intensity sports, or long-term standing, excessive leg strain, which causes cramps. Cramps can be accompanied by hot compresses or massage of the cramped area to relieve the tight muscles, which can relax the muscles and help relieve the pain.