There are two main causes of calf cramps: one, due to hypocalcemia, that is, the body’s calcium ion is low, easily induced calf cramps, so you should go to the hospital for blood tests to see if the blood calcium is normal, if the calcium ion is low, should be intravenous calcium and oral calcium supplements. Second, due to the calf area of the muscle, tendons, ligaments and other soft tissues strains or cold, strain, causing the accumulation of local inflammatory metabolites resulting in the formation of inflammatory lesions, in the exercise and cold when the leg muscles are prone to excessive contraction, causing spasm, cramps, should let the calf area fully relax, rest, promote inflammation metabolism, keep the muscles relaxed. Pay attention to warmth, do not get cold, apply warm water bags for hot compresses to increase blood circulation and promote the metabolism of inflammation.