Exercise calf soreness may be caused by physiological reasons such as excessive exercise and cold environment, or it may be caused by pathological reasons such as sciatic nerve entrapment and vascular diseases of the lower limbs. 1. Physiological reasons: the vast majority of the symptoms of calf soreness after exercise is due to excessive exercise or incorrect posture, these factors will cause anaerobic metabolism of the calf muscle or slight strain, resulting in the accumulation of lactic acid, stimulating the nerve root pain. In addition, not paying attention to the warmth of the calf when exercising will lead to spasm of the small blood vessels in the calf, and the above symptoms may also occur. 2. Pathological causes: if the sciatic nerve is compressed, the nerve will be pulled during exercise, and muscle pain along the sciatic nerve travel area may occur, common diseases such as pear-shaped muscle syndrome, lumbar intervertebral disc herniation and so on. In addition vascular diseases of the lower extremities, due to poor venous return, may also lead to the above symptoms, such as varicose veins of the lower extremities, arterial occlusive vasculitis. Sore calves after exercise, there may be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.