A movement to feel leg soreness has the following reasons: First, may be with the patient usually lack of exercise, suddenly increase the amount of exercise, resulting in leg soreness to produce lactic acid in a short period of time can not subside. Second, the injury of the lumbar spine, for the occurrence of herniated discs in the lumbar region, lumbar spinal stenosis and small joint disorders, etc., after compression of the dural sac and nerves easily appear lumbar leg soreness, in the usual rest, bed rest when the symptoms are reduced, down to walk or jogging when the symptoms have re-aggravated, need to do CT or magnetic resonance assisted diagnosis, to exclude herniated discs and lumbar spinal stenosis. Third, the need to exclude the lower extremity vascular disorders, such as occlusive vasculitis, varicose veins, etc., whether arterial blood supply or poor venous return, poor blood circulation in the lower extremities, will also appear after the movement of the obvious limb swelling and soreness.