The side of the calf cramps are often related to the following reasons: First, due to excessive fatigue, such as long-distance running, or frequent toe hooks, may cause muscle fatigue, which may lead to cramps. Second, due to cold, such as prolonged exposure to cold or cold objects, may lead to muscle spasms due to cold. Third, due to strong irritation, such an area suffered a serious injury, such as a knife wound, will produce severe pain in this area, and then the muscle produces a convulsive spasm. If the patient has serious sciatica or lumbar disc herniation and other diseases, it will produce severe radioactive pain here, which in turn will cause muscle twitching, and its caused by osteoporosis, which will lead to muscle twitching here.