Calf anterolateral muscle pain may be caused by trauma, local lactic acid accumulation, lower extremity arterial occlusion, lumbar intervertebral disc herniation and other reasons. 1. Trauma: such as strained calf muscle caused by strenuous exercise or muscle injury caused by calf injury, can lead to local oozing, edema, inflammatory factors gathered, stimulating the nerve causing pain. 2. Local lactic acid accumulation: after a long time of fast walking or running exercise, especially after strenuous exercise, it will cause the accumulation of lactic acid in the muscle tissue, and even muscle spasm, causing pain. 3. Lower extremity arterial occlusion: arterial blockage causes lack of blood supply and oxygen supply to the muscles in the lower leg, and the muscles gradually necrosis, eventually causing pain. 4. Herniated lumbar intervertebral disc: the herniated intervertebral disc compresses the lumbar 5 nerve root, which can cause pulling pain in the muscles of the outer calf. Muscle pain in the calf, it is recommended to actively go to the hospital, under the guidance of the physician standardized treatment.