The most common reason for calf cramps when running is the lack of exercise in general, and when you suddenly start to exercise, if you don’t warm up well, you will get calf cramps. At this point, you must stop and wait for the cramps to ease, and then slowly start to gradually increase the amount of exercise. The usual to adhere to gradually increase the amount of exercise, can effectively avoid this situation. There are also some patients who have cramps caused by abnormal muscle contractions and spasms due to calcium deficiency. It is important to pay attention to calcium supplementation, vitamin D supplementation, more sunshine and proper exercise to effectively relieve the symptoms. Also if the patient is exercising too much, strenuous exercise in a short period of time, calf cramps may occur. This is usually due to a large amount of anaerobic exercise resulting in an excessive accumulation of lactic acid, the calf muscles are in an anaerobic state for a long time, and this abnormal cramp occurs. This is the time to rest, so that the calf muscles get a full supply of oxygen.