Calf belly cramp is a very common clinical symptom, mainly the spontaneous mandatory contraction of the calf belly muscles, the onset of severe pain, generally lasts a few seconds or tens of seconds can be self-healing, the common causes and solutions see the following points: a. Common causes: 1, cold stimulation: such as winter exercise in a cold environment, before exercise without adequate stretching; summer swimming when the water temperature is too low, these Reasons are easy to cause calf belly cramps; 2, strenuous exercise: strenuous exercise when the whole body in a state of tension, leg muscles contract too fast, relaxation time is relatively short, resulting in increased local metabolic lactic acid, muscle contraction and relaxation is difficult to coordinate, and then the calf belly cramps; 3, too much sweating: exercise for a long time, the volume of exercise is relatively large, sweating, and no timely salt replenishment, the body fluid and Electrolytes are lost in large quantities, metabolic waste buildup, poor local blood circulation in the muscles, also prone to calf belly cramps; 4, calcium deficiency: in the process of muscle contraction, calcium ions play an important role. When the concentration of calcium ions in the blood is too low, the muscles are prone to excitement and cramps; 5, drug effects: If you take diuretics, morphine for pain, cimetidine for stomach problems, cholesterol-lowering statins or hormonal drugs for asthma, etc., may cause muscle cramps. Second, the solution: If leg cramps occur, you can immediately grab the thumb of the side of the cramp with your hand, and then slowly straighten your foot, and then forcefully stretch your leg, the symptoms of calf belly cramps will be relieved, or massage the calf belly with both hands vigorously, also has a significant effect. In addition, usually warm up well before exercise, pay attention to take warmth measures, and at the same time can supplement calcium supplements, observe the improvement of symptoms. If it is drug-influenced, the program needs to be adjusted under the guidance of a doctor. If it continues to not improve, calf belly cramps still occur frequently, it is recommended to promptly go to the hospital for examination and treatment.