Running is a high-intensity exercise that is particularly common in daily life, and the pain in the calf area that occurs after running may be due to the following reasons. First, patients do not exercise regularly in daily life, coupled with long-term standing and sitting in daily life and the increase in age, the muscle tolerance of the lower limbs decreases, and suddenly one day the patient to carry out high-intensity physical exercise, will make the muscle tissue quickly into the state of anaerobic exercise, resulting in the accumulation of harmful substances and metabolites, stimulating the leg muscles, and triggered the patient to appear the calf area of the pain. pain. Second, it may also be due to incorrect posture when running, or due to the running exercise before the adequate warm-up exercise, the local muscles are stretched during the running process, the injury occurred and caused by the pain.