Calf pain may be related to lumbar spine lesions, lower extremity vascular lesions, trauma and other reasons. Lumbar spine lesions such as lumbar disc herniation, spinal stenosis, lumbar spondylolisthesis and other compression of the spinal cord nerve roots, resulting in abnormal innervation function of the nerve to the calf, calf pain and numbness and other symptoms will occur. Lower extremity vascular lesions such as calf deep vein thrombosis, intermuscular thrombosis, varicose veins of the lower extremities, etc., can also cause calf pain. Calf belly trauma such as calf soft tissue injury, calf fracture, etc. can also cause calf belly severe pain, swelling, subcutaneous bruising and other symptoms. Calf cramps muscle spasms can also cause calf pain. Calf bone tumor, calf nerve fiber compression can also cause calf pain. After running and climbing and other strenuous activities, calf muscle fatigue can also cause physiological pain, usually after rest can be naturally relieved. If the symptoms of calf pain, it is recommended that patients go to the hospital for medical examination, complete the examination, under the guidance of the doctor for regular treatment.