When climbing stairs, patients experience pain in the calf muscles, which occurs due to excessive activity and injury to the calf muscles, resulting in lactic acid buildup in the muscles and impaired nutrient metabolism, which results in pain. In addition, when the patient climbs stairs, the quadriceps muscle group is also injured, which also involves the calf area and causes pain. After this phenomenon, the patient is instructed to stop the activity and rest in bed while elevating the lower leg. Apply ointment to the painful area to relieve blood stasis, reduce swelling and pain, or fumigate with Chinese herbs, or with infrared therapy, low and medium frequency electrotherapy, etc., which can significantly relieve or reduce pain.