Calf pain may be caused by physiological factors such as excessive exercise, but if the symptoms persist, we need to be alert to pathological factors including local inflammation, sports injuries, calcium deficiency and lumbar spine pathology. 1. Physiological factors: excessive exercise in a short period of time can lead to soreness in the calf area due to the accumulation of lactic acid in the muscles, which can be relieved in about 2-3 days by localized hot compresses, massage, etc., and is not caused by disease factors. 2. Pathological factors need to be alert to the following diseases (1) Local inflammation: Inflammation in the calf area, such as fasciitis, will trigger the symptoms of calf soreness, so be alert to the possibility of inflammation in the calf when there is persistent soreness. (2) Sports Injury: If calf pain occurs during exercise, or if calf pain persists after exercise and gradually worsens, accompanied by swelling, it is possible that local muscle and soft tissue injuries, such as muscle ligament strains, have occurred during exercise, and medical examination and treatment are needed as soon as possible. (3) Calcium deficiency: When there is a lack of calcium in the body, calf pain is likely to occur, often accompanied by frequent cramps. (4) Lumbar spine lesions: If there are lumbar spine lesions, such as lumbar disc herniation or lumbar spinal stenosis, it is possible to compress the nerve roots, which will produce the abnormal sensation of calf pain. If the calf pain persists for a long time, it is recommended to consult a doctor in time to clarify whether there are disease factors, and then targeted treatment.