A running calf muscle soreness is mostly formed due to 2 points. 1, a single large amount of exercise, lactic acid accumulation in the calf, or acute strain on local muscles and tendons, calf muscle soreness can occur after running. 2, if the patient is a post-surgical patient, local lower limb redness and swelling at the same time calf muscle soreness, the symptoms are more obvious after running, do not exclude muscle soreness caused by deep vein thrombosis of the lower limb, in addition to calf soreness In addition to the soreness of the lower leg, there is often localized redness, swelling and heat pain in the limbs, and there is obvious pressure pain in the calf area. The presence of thrombosis can be detected by ultrasound and lower limb venography, and thrombolytic treatment should be actively given.